Thanks, Alex. I managed to get that working a treat. On Saturday, 11 April 2020 08:38:05 UTC+1, Alex Harsanyi wrote: > > > The renderers that you pass on to the `plot` function can be manipulated > outside the call to plot, so you can read the datasets you need, construct > a renderer for each one, group them in a list and pass them on to plot. I > am not familiar with Matlab, but based on your description, you can > implement hold-on and hold-off as follows: > > #lang racket > (require plot) > > (define the-renderers '()) > > (define (hold-on renderer) > (set! the-renderers (cons renderer the-renderers))) > > (define (hold-off) > (begin0 > (plot (reverse the-renderers)) > (set! the-renderers '()))) > > ;; add a renderer for SIN > (hold-on (function sin 0 10)) > > ;; add a renderer for COS > (hold-on (function cos 0 10)) > > ;; Show the plot > (hold-off) > > Alternatively, if you want a separate plot for each function, you can > implement hold-off as follows: > > (define (hold-off-2) > (begin0 > (for/list ([renderer (reverse the-renderers)]) > (plot renderer)) > (set! the-renderers '()))) > > Alex. > > On Thursday, April 9, 2020 at 2:35:04 PM UTC+8, greadey wrote: >> >> Hi All, >> >> Can anyone give me some pointers on plotting multiple data sets on one >> set of axes. Plotting two or more data sets on one set of axes is easy if >> you know in advance what the data is called; >> >> (plot (list >> (lines set1) >> (points set2)) >> #:x-label "x" #:y-label "y") >> >> however I have a list of data sets generated from reading a bunch of >> files in a directory and I wish to loop through the list and add each >> data-set to an existing set of axes. >> >> Iterating through the data and plotting each set results in multiple plot >> windows. >> >> In summary I am looking for something similar to Matlab's "hold on" e.g. >> >> ;Pseudo Matlab code >> >> figure() >> for idx = 1 : numel(list-of (list-of vector-pairs)) >> plot(list-of (list-of vector-pairs))(idx) >> hold on >> end >> hold off >> >> I have got (plot-new-window? #t), however as far as I know this is just >> causing a plot to appear in a new window rather than directly in the repl. >> >> Many thanks, >> >> greadey. >> >
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