MATLAB: Using the figure command only once. — somehow the subplot appears afterwards.

plotplotting

I wrote code to create a figure with 2 subplots.

when I then use a boxplot command after that, one subplot from above appears again and on the right next to it appears the wanted plot.

I can forego this issue by using another

figure;
%%my plot

command afterwards. however, I do not fully understand the 'mechanics' behind that, which is why I want to ask what is going on. Why can i not plot as usual without creating a figure? (When I plot as usual wihtout creating a figure this subplot-appearing-again-issue occurs).

Thank you

Best Answer

Could you clarify if you are using a live script or not?

By default, plot commands will plot onto the current axes (last plot created/interacted with). It will only create a new figure if there is no current axes. If the previous figure has a suplot, then the next plot command will replace the last subplot plot.

The way around this is to use the figure command to create a new blank axes before plotting.

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MATLAB: Iteration only runs once.

...a part of the code that calls other functions until a parameter is true...

You probably want to use while loop and then you need to change the variable realpositiondetected to false and change it to true inside the loop based on the return values of all the other functions. For example,

realpositiondetected = false;
counter = 0;
while ~realpositiondetected
   %call the other functions here
   %check what you want to do is fullfilled
   counter = counter+1;
   if(someReturnValue == whatYouWant)
       realpositiondetected = true;
       break; 
   elseif(counter>=25)
       disp('counter exceeds limit, breaking the loop!')
       break;
   end
end

See I have used break instead of return. Documentation says, If you call the function or script that contains return directly, there is no invoking function and MATLAB returns control to the command prompt.

Also, you can break your loop in case if your realpositiondetected becomes true.

So I'd advise to use break for your purpose. read more here.

https://de.mathworks.com/help/matlab/ref/break.html

https://de.mathworks.com/help/matlab/ref/return.html

MATLAB: Plot line in subplot removes axes title

Functions like plot have side effects, one of which is to clear the title. Just change the order:

p = plot(a,1:10,1:10:100);
a.Title.String = 'This is a subplot';

Well, technically, it is not the plot function that has this effect, it is the axes property

'NextPlot'

which defaults to

'Replace'

and when it is set to 'replace' the next instruction to plot (or imagesc or anything that plots onto the axes) will not only remove existing plots but will also reset all axes properties except position and units (this is in the help for Axes Properties under 'Next Plot', but is not obvious from the help of 'plot' itself).

Best Answer

Related Solutions

MATLAB: Iteration only runs once.

MATLAB: Plot line in subplot removes axes title

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