powershell multiply numbers in a csv file
HELP!!!
Using powershell how can i multiply a number by -1? In attached file that looks like this. I need to multiply the numbers after the 3rd comma by -1. So if its a negative, make it a positive, and positive a negative.
H,20170620230011,1,19551,2
004,2017-06-20 00:00:00,0001450002100,-1,
004,2017-06-20 00:00:00,0001500007553,-1,
004,2017-06-20 00:00:00,0001800000210,-8,
004,2017-06-20 00:00:00,0001800000216,-1,
004,2017-06-20 00:00:00,0001800000235,12,
resulting output should look like this.
H,20170620230011,1,19551,2
004,2017-06-20 00:00:00,0001450002100,1,S
004,2017-06-20 00:00:00,0001500007553,1,S
004,2017-06-20 00:00:00,0001800000210,8,S
004,2017-06-20 00:00:00,0001800000216,1,S
004,2017-06-20 00:00:00,0001800000235,-12
Using powershell how can i multiply a number by -1? In attached file that looks like this. I need to multiply the numbers after the 3rd comma by -1. So if its a negative, make it a positive, and positive a negative.
H,20170620230011,1,19551,2
004,2017-06-20 00:00:00,0001450002100,-1,
004,2017-06-20 00:00:00,0001500007553,-1,
004,2017-06-20 00:00:00,0001800000210,-8,
004,2017-06-20 00:00:00,0001800000216,-1,
004,2017-06-20 00:00:00,0001800000235,12,
resulting output should look like this.
H,20170620230011,1,19551,2
004,2017-06-20 00:00:00,0001450002100,1,S
004,2017-06-20 00:00:00,0001500007553,1,S
004,2017-06-20 00:00:00,0001800000210,8,S
004,2017-06-20 00:00:00,0001800000216,1,S
004,2017-06-20 00:00:00,0001800000235,-12
ASKER CERTIFIED SOLUTION
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Line 4 starts the output file by reading the first line from the input file, and writing it to the output file.
Line 5 reads the input file, skips the first line, converts each row to a PSObject; the (1..7 | ForEach-Object {"Col$($_)"}) creates an array of strings Col1-Col7.
Line 6 does the job.
Line 7 writes the changed object back to the pipeline.
Line 8 takes each row generated in the ForEach loop, converts it to csv, skips the first (header) line, removes the double quotes that ConvertTo-Csv automatically adds around each field, and adds the result to the output file.
Line 5 reads the input file, skips the first line, converts each row to a PSObject; the (1..7 | ForEach-Object {"Col$($_)"}) creates an array of strings Col1-Col7.
Line 6 does the job.
Line 7 writes the changed object back to the pipeline.
Line 8 takes each row generated in the ForEach loop, converts it to csv, skips the first (header) line, removes the double quotes that ConvertTo-Csv automatically adds around each field, and adds the result to the output file.
ASKER
Again thank you so much.
ASKER