How to make a 2D plot of a function with an additional parameter, which I can change "live"?

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Vlad Matjuschkin
Vlad Matjuschkin 2017-1-23
评论： Jorge Mario Guerra González 2017-1-23
Hello, guys!
Imagine that we have a simple function y=x+1+C. I'd like to have a 2D plot for x-y and add an additional "bar" to change the parameter "C". Any ideas how I can do it?

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回答（2 个）

Jorge Mario Guerra González
there is option to link plot when you open figure
for example:
C=0;
x=1:1:100;
y=x+1;
plot(x,y)
then enable plot linking
linkdata on
Check what happends when you change C value and reassign Y:
C=1000;
y=x+1+C;
It can be enabled from that button as well.
Vlad Matjuschkin
Vlad Matjuschkin 2017-1-23
Hi Jorge,
It works, BUT, to change the "C" you need to type
C=1000;
y=x+1+C;
every time.
Let's say, we want to check one hundred values C=1:1:100. We will spend lots of time by typing that again and again ... Is there any other method or app? I simply want "shift" the C-value up and down and see how the function will change.*
*I saw one guy could do it in Excel. He said he installed a special "macro" ... People do it in Maple as well. If excel can do it, why not MATLAB?
  2 个评论
Jorge Mario Guerra González
Jorge Mario Guerra González 2017-1-23
Well, typing C=... is just an example, if you are working on a GUI
then add the command
linkdata on %which enables linkdata on your axes.
put that into the callback of the slider. Then instead of typing C, you put something like...
handles.C=get(handles.slider1,'Value');
y=1+x+C;
axes(hanldes.axes1) %Select the axes you want to plot it on
plot(x,y)

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