How can I change parameters during a plot?

Hello,

I have 2D graph like:

x = []
hold on
for w= 20:100:20000
    i= 0.5
    x(end+1) = (i*sin(w))
end
hold off
    w= 20:100:2020
plot(w,x)

In this case "i" is always 0.5, for all "w" values. I would like to know if there is anyway to plot a sigle plot graph, in wich the value of "i" varies depending on the band of "w".

[Stephen23]

Can you explain what you mean by "the band of "w"." ? What is a "band", can you show us an example of what such "band" values would be like?.

Note that how you are generating your data is very inefficient: using a loop and expanding the output array with each iteration is poor MATLAB code, it is much simpler and faster to write vectorized code instead, without using any loops:

>> w = 20:100:20000;
>> x = 0.5 * sin(w);
>> plot(w,x)

Note that your vector w increases in steps of 100: the function sin input is in radians (not degrees), so that step size makes your data essentially meaningless. A more typical step size would be 0.1 or so.