How to set UIAxes min and max lim for plot in app designer ?

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Hi All
to set a min and max limit for my UIAxes in add designer I use :
ax=app.UIAxes;
ax.YLim([minlim,maxlim])
but I get the error :
Subscript indices must either be real positive integers or logicals.
  7 Comments
farzad
farzad on 13 Apr 2020
not at all, I have already written the handle I used in the above comments. nothing about linkaxes. I took the derivative of the Y axis : since it was dispalcement and I wanted to have the velocity
farzad
farzad on 13 Apr 2020
Edited: farzad on 13 Apr 2020
my bad, I was defining the minumum and max before derivating, but doing the following lines. it gives the minimum of all the present signals in the UIAxes too smaller than the actual minimum. I mean, if I have 3 plots, the minimum of the 3 plots be -3 , with the following I get -40
minlim=0;
maxlim=0;
for i=1:numel(app.UIAxes.Children)
if minlim==0
minlim= min(app.UIAxes.Children(i).YData);
else
if abs(minlim)>abs(min(app.UIAxes.Children(i).YData))
minlim=min(app.UIAxes.Children(i).YData);
end
end
if maxlim==0
maxlim= max(app.UIAxes.Children(i).YData);
else
if abs(maxlim)<abs(max(app.UIAxes.Children(i).YData))
maxlim=max(app.UIAxes.Children(i).YData);
end
end
end
ax=app.UIAxes;
ax.YLim=[minlim,maxlim];

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Accepted Answer

Adam Danz
Adam Danz on 13 Apr 2020
Edited: Adam Danz on 13 Apr 2020
It looks like what you want to do is
axis(app.UIAxes, 'tight')
Your current code does not give you the minimum of all plotted signals. It just gives you the minimum (and maximum) of the last plotted signal listed in app.UIAxes.Children since you're overwriting the minlim and maxlim values upon each iteration of the for-loops.
  8 Comments
farzad
farzad on 13 Apr 2020
yes, I repeate it for another line and that gives the second derivative. but anyway, when I removed that first line or copied the values of second row to the first row, this problem vanishes. so I think it's not a problem of derivation

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More Answers (1)

Tommy
Tommy on 11 Apr 2020
Use
ylim(ax, [minlim,maxlim])
instead.
  3 Comments
Tommy
Tommy on 12 Apr 2020
You get an error? Or the limits don't change?
Are you able to post all of your code, or at least enough for us to plot what you are trying to plot?
farzad
farzad on 12 Apr 2020
Well I differentiate the vertical axis. And the axis limits don't change from the original. Sorry that I can't put the whole code but I think I have been descriptive

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