CODEWITHSUNDEEP
gnuplot
hrondor
hrondor

Reputation: 127

Gnuplot - plot for - first row as labels

Version of gnuplot:5.4

I have dataset in format:

Label1 Label2 Label3
1 2 3 
2 5 6

I want to use plot for command, because number of columns isnt static and I want to use first row of dataset as labels.

When i use: plot for [i=2:dataset_columns] 'dataset.dat' using ($1):($i) with lines axes x1y1

Error:

warning: bad data on line 1 of file dataset.dat
Column number or datablock line expected

Question: How to edit my command to get data printed, how to use first row as labels?

Thank you for your help.

Upvotes: 0

Views: 1107

Answers (1)

theozh
theozh

Reputation: 25734

In gnuplot console check help plot for. If you read it to the end you will see:

If an iteration is to continue until all available data is consumed, use the symbol * instead of an integer . This can be used to process all columns in a line, all datasets (separated by 2 blank lines) in a file, or all files matching a template.

Examples:

  plot for [i=2:*] 'datafile' using 1:i with histogram
  splot for [i=0:*] 'datafile' index i using 1:2:3 with lines 
  plot for [i=1:*] file=sprintf("File_%03d.dat",i) file using 2 title file

Code:

### plot all columns until last column
reset session

$Data <<EOD
Label1 Label2 Label3
1 2 3 
2 5 6
EOD

plot for [col=2:*] $Data u 1:col w l title columnhead
### end of code

Addition: (in case you have a datafile named datafile.dat)

Label1 Label2 Label3
1 2 3 
2 5 6

Code:

### plot all columns until last column
reset session

plot for [col=2:*] 'datafile.dat' u 1:col w l title columnhead
### end of code

Result:

enter image description here

Upvotes: 2

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