Changing a positive value to a negative one
By : Nathan
Date : March 29 2020, 07:55 AM
will help you In Android how can I change a value to a negative number? , Multiply pos1_deg by 1:

Java math function to convert positive int to negative and negative to positive?
By : dracoroboter
Date : March 29 2020, 07:55 AM
wish help you to fix your issue Is there a Java function to convert a positive int to a negative one and a negative int to a positive one? , What about x *= 1; ? Do you really want a library function for this?

Categorize the data into three groups (positive,negative) (positive,positive) (negative,negative) based on $3 and $2
By : Dominique Heinen
Date : March 29 2020, 07:55 AM
To fix this issue I think you need to do a two stage filter, as you need to perform the initial grouping by column 2 followed by the inspection of the values of column 3. The initial grouping should populate a dictionary, as presumably the column 2 values can vary quite a bit: code :
grouped_rows = {}
for row in rows:
second_column = row.split(" ")[1]
if second_column in grouped_rows:
grouped_rows[second_column].append(row)
else:
grouped_rows[second_column] = [row]
def row_value(row):
return float(row.split(" ")[2])
for rows in grouped_rows.values():
has_positive = any([ row_value(row) >= 0 for row in rows ])
has_negative = any([ row_value(row) < 0 for row in rows ])
if has_positive and not has_negative:
write_rows(file_1, rows)
elif has_positive and has_negative:
write_rows(file_2, rows)
else:
write_rows(file_3, rows)

How to make pandas/core/generic/pct_change to return a positive value when changing from a negative to a positive value
By : Maninder Kumar Singh
Date : March 29 2020, 07:55 AM
I wish this helpful for you You can write your condition out and multiply by 1 wherever it's met: code :
>>> p = df["input"].pct_change()
>>> p
datetime
20110101 NaN
20110102 0.775011
20110103 1.329728
20110104 3.253051
Name: input, dtype: float64
>>> p.loc[(df["input"].shift() < 0) & (df["input"] > 0)] *= 1
>>> p
datetime
20110101 NaN
20110102 0.775011
20110103 1.329728
20110104 3.253051
Name: input, dtype: float64

Javascript: Changing a positive number to a negative?
By : Gabriele Monti
Date : March 29 2020, 07:55 AM
Hope this helps Unary operators in Javascript are basically shorthand functions. You can find the documentation for the Unary () hereThe  takes in one argument. The number you pass to it. Under the hood, I'm guessing it multiplies it by 1 and returns the product. The function could be written along the lines of: code :
function (arg) {
return arg * 1;
}
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