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Get the min value of one variable greater than the observation of another variable
hop of those help? For every value of a we find the closest value of ref which is greater than or equal to a if it is present or else return 0.
TAG :r
Date : October 25 2020, 09:10 AM , By : Siratis Warawatsuppa
Reference previous value in data.table calculation
I think the issue was by ths following , I'm trying to reference the value in a previous calculation during the current one. I've tried using shift(), but it does not work when using the same variable. , We need a logic with accumulate
TAG :r
Date : October 25 2020, 09:10 AM , By : thyersnn
'Can't create call to non-callable object' error while summarizing data by grouping
I wish did fix the issue. The issue is with the column types. These are factor columns creating by quoting the 'TRUE'/'FALSE' which results in character type. But, the data.frame call by default use stringsAsFactors = TRUE. Therefore, we get factor c
TAG :r
Date : October 25 2020, 09:10 AM , By : Ramunas
Multiplying all columns in dataframe by single column
like below fixes the issue I know it is a basic quaestion but couldnt find any solution to it. I want to multiply all columns of a dataframe by single column. , Also try
TAG :r
Date : October 25 2020, 09:10 AM , By : Aniran
Calculating Standard Deviation by each unique variable in R.
I hope this helps . I am very new to R and have started to learn the basics but I am struggling with the more advance concepts. , This should do what you want:
TAG :r
Date : October 24 2020, 08:10 PM , By : user2172161
Fisher exact test for each gene
wish help you to fix your issue I would like to do rna seq data for several genes, tested in control and treatment. To do fisher.test I need a contingency table for each gene, is there a way to do this in R instead of computing a contingency table fo
TAG :r
Date : October 24 2020, 08:10 PM , By : user2172098
Sorting coordinates to create a polygon gives messy results
it fixes the issue How can I obtain a polygon with the shape of South Africa starting with a set of coordinates representing the country boundaries organised in a data.frame? I am getting pretty close, but I am not managing to create the polygon with
TAG :r
Date : October 24 2020, 08:10 AM , By : user2172357
Merging legends in ggplot fails with certain expressions
it helps some times This is where you want to use bquote over expression. Not exactly sure of the mechanic or reason behind this.
TAG :r
Date : October 24 2020, 08:10 AM , By : Joe
Shiny modal dialog in response to multiple buttons
To fix this issue Consider the following app: , You need to set ignoreInit = TRUE for observeEvent:
TAG :r
Date : October 24 2020, 08:10 AM , By : user2172265
Error connecting to mongoDB using Mongolite
Hope that helps As the message says, there is a mismatch between versions of the client and the server.More precisely, mongolite relies on a more general driver written in C, libmongoc, and it seems the version automatically installed by the install.
TAG :r
Date : October 23 2020, 08:10 PM , By : user2172493
R: networkD3 sankey plot - colours not displaying
I think the issue was by ths following , The problem you're having must be with the data you are using, but I can't tell you precisely what because you haven't shared it. If I use properly structured data and use it as the inputs, your first, exact s
TAG :r
Date : October 23 2020, 08:10 PM , By : Nadine Miller
Merging two rows into one header using R
hope this fix your issue I guess you need to paste the first row in header and then delete the row
TAG :r
Date : October 23 2020, 08:10 PM , By : Sreedeep Moulik
Parse JSON to dataframe returns different numbers
Any of those help It looks like a rounding error to me, as you have an awful lot of digits. I guess in order to even show your data.frame you had to specify that you wanted a lot of digits, and in the documentation for ?print it says"Note that for la
TAG :r
Date : October 23 2020, 08:10 AM , By : Vijaya Kumbhar
How to number by group?
seems to work fine I want to add "seq" column as numbering by group which is organized with BSTN, ASTN, O and D. This work is hard to me to classify as another group within the group. A group is created whenever BSTN and O are equal, and ASTN and D a
TAG :r
Date : October 23 2020, 08:10 AM , By : user2172572
Multinomial probit regression with mixed type explanatory variables
hope this fix your issue I have a data frame called aggregates composed of numerical columns each having a significant amount of zero values. I want to fit a probit model for each column by regressing them on another data frame called exp_vars. exp_v
TAG :r
Date : October 22 2020, 08:10 PM , By : user2172869
How can I make a variable in a dataset containing a vector of all numbers between two other variables?
fixed the issue. Will look into that further Here's an example dataframe.
TAG :r
Date : October 22 2020, 08:10 PM , By : user2172846
How to extract the trailing digits from a string in R?
To fix the issue you can do I have a column of data that looks like this: , In case you always have the Q1_ string, you can do:
TAG :r
Date : October 22 2020, 08:10 PM , By : Kirthi Deva
Select values based on other columns
I hope this helps . 1) Here Mean does the calculation for one row and we apply it to each row separately. We are assuming here you want to zero elements in the first 3 columns whose corresponding column among the last 3 columns are positive and then
TAG :r
Date : October 22 2020, 08:10 AM , By : user2172926
readLines killing R in purrr::map
will be helpful for those in need I keep losing my session* in the console when trying to perform readLines (from base) with map (from purrr). , this will work:result
TAG :r
Date : October 22 2020, 08:10 AM , By : user2172881
Subset rows based on "start and stop" strings
hop of those help? You can lookup where a value is with the function which, and use that as in index to get the values you are looking for. If you want everything from the first to the second "c", it would look like this:
TAG :r
Date : October 21 2020, 08:10 PM , By : user2173193
How to add a column to lists within a list without losing their names?
I hope this helps . I did several attempts to add a specific column to data frames resp. lists within a list, but all *apply() attempts failed to preserve the names of the data frames. , Try Map
TAG :r
Date : October 21 2020, 08:10 PM , By : user2173176
Plotting the means in ggplot, without using stat_summary()
this one helps. In ggplot, I want to compute the means (per group) and plot them as points. I would like to do that with geom_point(), and not stat_summary(). Here are my data. , You could do
TAG :r
Date : October 21 2020, 08:10 PM , By : user2173165
R :Looping through each 5 rows of data frame and imputing incremental value
will be helpful for those in need I am trying to impute incremental values for each 5 rows of the data frame. I am new to R and not sure how to achieve this. , This is your data:
TAG :r
Date : October 21 2020, 08:10 PM , By : ahmed gamal
In R, is growing a list just as inefficient as growing a vector?
wish help you to fix your issue , The answer seems to be 'yes'. You can benchmark it.
TAG :r
Date : October 20 2020, 08:10 PM , By : user2173563
Flexdashboard, rhandsontable: how to programmatically access user updated table?
I hope this helps . Not a Shiny programmer. Simple question. rhandsontable in Flexdashboard app. How to access a column updated by the user? Sample code: , you can use hot_to_r as in
TAG :r
Date : October 20 2020, 08:10 PM , By : user2173530
Creating Summary Table from R Variables
should help you out You can create multiple summary statistics with summarise, all on the same data frame:
TAG :r
Date : October 20 2020, 08:10 PM , By : Luke
Average over groups and include previous groups
will help you I have a dataframe (df, a sample of which was created below). I want to group by group1 and group2 and take the average of the value. When taking the average, I want to include previous groups within group1. , We may do the following:
TAG :r
Date : October 20 2020, 08:10 PM , By : ballertom
R: data.table count rows on specific columns > 0
this will help I am try to do a countif function like in excel. I want to countif a select set of columns in a row that are > 0. , Here is a way using rowSums:
TAG :r
Date : October 20 2020, 08:10 PM , By : user2173486
Transform (shuffle) just 2 Fields in a Dataframe
help you fix your problem I have a data frame with firstname, lastname and I want to permutate them but ONLY for the rows that have values. There are many null fields and I don't want reorder them so that there is ever a firstname value without a las
TAG :r
Date : October 20 2020, 08:10 PM , By : user2173445
Issue with replacing string by match in R
Hope this helps I want to replace the cell elements to "NA" if a cell element starts with "F" and all trailing cell elements in a row. , I started by truncating your data for brevity:
TAG :r
Date : October 20 2020, 08:10 AM , By : user2173718
(very) Simple quantstrat trading model using logistic regression
Does that help Looks like you're almost there. You fit the model on the training data, and made sure to do the backtest on the test set, which is the right thing to do.Some things you want to be careful about though: don't set prefer = low in add.rul
TAG :r
Date : October 20 2020, 08:10 AM , By : user2173644
R - count maximum number of consecutive dates
wish helps you Let's first make a function that would find the maximum number of consecutive days, given a vector:
TAG :r
Date : October 20 2020, 08:10 AM , By : user2173624
Problems using tidyr separate on "|"
To fix this issue I have an object lncRNA_lengths like this: , This should do it, first make fake data:
TAG :r
Date : October 20 2020, 08:10 AM , By : Malcolm Googe
Default value when calling a function in a for loop
To fix this issue You could look up the value with formals, which gives you a list which includes all the default values. But it comes with its own set of problems, as not all functions handle things the exact same way.The first problem becomes clear
TAG :r
Date : October 19 2020, 08:10 PM , By : Vlad League
Finding values in a matrix from list of values in R
I wish did fix the issue. Could somebody please point me in the right direction? I have a list of results (df2 below) and I want to use those to find the values from the matrix (df below). , Here is a base R way
TAG :r
Date : October 19 2020, 08:10 PM , By : Denis S
count 0's in a zoo (or dataframe) object
fixed the issue. Will look into that further Create a test zoo object z and then use the indicated expression. If you know there are no NAs then the na.rm = TRUE argument can be omitted. This also works for a data frame and also for a matrix.
TAG :r
Date : October 19 2020, 08:10 PM , By : maiterela
Finding the first non-zero year in data frame for multiple variables using tidyverse
hope this fix your issue I have the following data: , We may do the following:
TAG :r
Date : October 19 2020, 08:10 AM , By : Satish Thota
ggplot2 - how to assign geom_text with arrow icon to second yaxis scale
I think the issue was by ths following , We can achieve what you're after if we scale values of ws such that they use the same range as conc, and then apply the inverse transformation inside sec_axis. The transformation that we are applying takes the
TAG :r
Date : October 19 2020, 08:10 AM , By : user2174070
regex fails with dollar sign
wish helps you In R, I'm trying to match a series of strings from a vector of file names. I only want those without letters that end with .tif , It's not $ what fails but the usage of brackets. Instead you want
TAG :r
Date : October 19 2020, 08:10 AM , By : Luka Stošić
Drop first element of list of lists, condense list of lists? Too many elements?
this will help The object shown in the question is not a list of lists of 4 data frames each so if we call that object L then to get what is described we need to create LL like this. Now using LL we can compute the 3 items requested.
TAG :r
Date : October 19 2020, 08:10 AM , By : DoomsDayDave
R - how to apply output of ifelse(str_detect ...) to whole group
wish helps you I'm trying to flag all instances in a group if one variable contains the values "PICU" or "CCCU" (or both). , We may do
TAG :r
Date : October 18 2020, 08:10 PM , By : Zwiterrion Fritzwagg
caret package confusion matrix define positive case with multiple classes
Does that help Looks like a misinterpretation. It happens that positive is not used anywhere when there are more than two classes. First caret:::confusionMatrix.default gets called for some "formalities" and then we go to caret:::confusionMatrix.tabl
TAG :r
Date : October 18 2020, 08:10 PM , By : Don VJ
Generating a pairwise 'distance' matrix
it helps some times This is a cumulative distance, so take a cumulative sum and then do the distance calculation:
TAG :r
Date : October 18 2020, 08:10 PM , By : Mohan Phatak
Change all R columns names using a reference file
around this issue You can rename multiple colums at the same time, and there's no need to move the data itself that's stored in your data.frame. If you know the right order, you can just use
TAG :r
Date : October 18 2020, 08:10 PM , By : user2174157
In R & dabestr, how do I get grouped differences correctly?
around this issue Using dabestr package I'm trying to get the differences between two sets of control test data. Moifying slightly example from help file I tried: , For a paired plot, you want to nest the idx keyword option as such:
TAG :r
Date : October 18 2020, 08:10 AM , By : beachbatsch
Exclude or set a unique color to the bottom triangle of a correlation matrix heatmap
This might help you One option would be to not use the complete correlation dataset and filter out only one half of the matrix using upper.tri. You could even consider setting its diag argument to TRUE to get rid of the arguably unnecessary diagonal
TAG :r
Date : October 18 2020, 08:10 AM , By : user2174447
r shiny observe function clears text input
Any of those help I think the problem comes from the observe function. Each time you write a letter, it sends a request to your credential database. You should try to use ObserveEvent instead :
TAG :r
Date : October 18 2020, 08:10 AM , By : user2174378
Split column by multiple delimiters, keeping delimiters
around this issue How can I split a character column into 3 columns using %, -, and + as the possible delimiters, keeping the delimiters in the new columns? , In data.table the equivalent is tstrsplit:
TAG :r
Date : October 18 2020, 08:10 AM , By : dennis
How to random search in a specified grid in caret package?
will be helpful for those in need One approach would be to define a grid and use sample to pick several random rows:
TAG :r
Date : October 17 2020, 08:10 PM , By : CoalBlack
merge 2 data frames in a loop for each column in one of them
around this issue We could use lapply over all the columns of mydf and match the value in mydf with that code column in codetable and get corresponding translation.
TAG :r
Date : October 17 2020, 08:10 PM , By : Renuka Aggarwal
how to edit the codes for the summary of R S4 Object?
I hope this helps you . You will need to write methods for the functions print, show and summary if you want custom behaviour for your S4 objects. For example
TAG :r
Date : October 17 2020, 08:10 PM , By : delineas
Remove specific rows in R
hope this fix your issue You should use grep, not grepl. When you use grep you get the row indexes that match the pattern, while with grepl you get a boolean vector. You could do:
TAG :r
Date : October 17 2020, 08:10 PM , By : Greg Baird
Flatten JSON list into data frame
Hope this helps I have a directory of 143 JSON files (~30 MB), which I would like to combine and convert to a flat data frame. (This might be related to this question, but I couldn't get that solution to work. See bottom for results.) , Do you mean t
TAG :r
Date : October 17 2020, 08:10 PM , By : Mister Dahood
Filtering a dataset and making a ggplot
Any of those help I'm trying to filter a dataset within ggplot(), and display a set of line charts for various countries with a population under 5 million. , Few changes in the code and it works for me after loading the data.
TAG :r
Date : October 17 2020, 08:10 PM , By : user2174477
Align cells vertically to be at the bottom flextable
I hope this helps you . You need to use function style, there is no shortcut for that property.
TAG :r
Date : October 17 2020, 08:10 AM , By : Ákos Nagy
R speed up sapply
hope this fix your issue I've got the following script in a loop: , Gregor, This is probably better:
TAG :r
Date : October 17 2020, 08:10 AM , By : guillermo.elia
invalid subscript type 'list' Azure Machine Learning
I hope this helps . PROBLEM , FIXEDProblem:
TAG :r
Date : October 17 2020, 08:10 AM , By : kyledcline
Use rollapply with xts object and an anonymous defined function
To fix the issue you can do I am not sure if you can apply the rollapply to the entire dataframe. You can apply it to every column separately with lapply and since you want sum of second and third element you can reduce the width as 2 instead
TAG :r
Date : October 17 2020, 08:10 AM , By : maximiliano paredes
Isolate data frames from a spreadsheet to create a list
seems to work fine How do I isolate data frames in R from a large spreadsheet of data and create a list from the isolated dataframes?
TAG :r
Date : October 17 2020, 08:10 AM , By : Aya Sherwani
Error in xts, as.POSIXct "'order.by' cannot contain 'NA', 'NaN', or 'Inf'"
To fix the issue you can do Here are some lines of code with randomly generated data to help you. Just replace "db0" with your data imported from Excel (start from scratch and try to remove the Date column this time)
TAG :r
Date : October 17 2020, 08:10 AM , By : user2174684

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