CODEWITHSUNDEEP
gnuplot
J.Doe
J.Doe

Reputation: 109

How to convert integer into string gnuplot

My code is the following, I would like a to assume iteratives values like '3' , '4' and so on. My code is like:

a=2
#perform some basic operation like:
b=a*2
#convert it to string
c=str(b)
p path1 u 1:($1<=0?$@c:1/0) w filledcurves y=0

The solution proposed on similar topic here so far did not work.

Upvotes: 0

Views: 510

Answers (3)

J.Doe
J.Doe

Reputation: 109

You should use this syntax

  c=''.b

c will be equal to 'b'

Upvotes: 2

theozh
theozh

Reputation: 25714

If I correctly understand your minimal incomplete non-working example, I can only guess what you probably wanted to do, i.e. limit the plot of a dataset in a certain column which is selected by some variable. Correct? If my guess is true, I would do it the following way, no need for string conversion and the use of macros. Check help column.

a=2
# perform some basic operation like:
b=a*2
plot path1 u 1:($1<=0 ? column(b) : NaN) w filledcurves y=0

Upvotes: 0

Ethan
Ethan

Reputation: 15093

gnuplot provides both sprintf (as in the C language routine) and a private implementation gprintf that offers formatting options beyond the normal ones provided by the C language. The full details with all supported format options are in the gnuplot documentation. A very simple use would be:

c = sprintf("%8.3f", b)

However, it makes no sense to convert the value to a string if your intent is to use it in a plot command that expects a number. There is no iteration in the pseudo-code you show so I can't guess exactly where you are headed with this but note that the operation @c to evaluate c as a macro expansion inside an iteration will always yield the content of c as it was prior to the iteration. So using the @ operator inside an iteration is almost always wrong.

Upvotes: 1

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