gnuplot-info

[Gnuplot-info] help needed on a special compare and if task

[Jon <dev...@gm...>]

Dear All,

I use macro to control whether output to a file or on screen by defining a
variable debug. I would like to output a string on screen to remind me where
the output is by writing code like

debug = ''
print (debug=='#' ? 'output in file' : 'output on screen')

However, gnuplot complains that

Non-numeric string found where a numeric expression was expected

How can I possibly circumvent this error and get what I want, thanks!

Sincerely,
Jon

Re: [Gnuplot-info] help needed on a special compare and if task

[Hans-Bernhard B. <HBB...@t-...>]

On 19.09.2011 18:24, Jon wrote:

> print (debug=='#' ? 'output in file' : 'output on screen')
>
> However, gnuplot complains that
>
> Non-numeric string found where a numeric expression was expected

Of course it does.  == is an operator for numbers, but you're passing it 
strings.  Please see "help expressions operators binary" for the 
operator you really need.