How to plot only a few values of a matrix?
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I have two array of size 48000 1 and I would like to plot only values less than "X". I am new to matlab. Thanks and any help is validates.
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Marshall
2013 年 6 月 6 日
編集済み: Marshall
2013 年 6 月 6 日
If 'temp' is your array that is 48000x1 you can specify specific indices as follows:
temp(1:X, 1)
This will get rows in temp from 1 to 'X' in the first column. General form being:
temp(w:x, y:z)
This will return the values in temp from rows 'w' to 'x' and columns 'y' to 'z'.
To then plot simply:
plot(temp(1:X, 1))
Hope this helps!
//edit Just reread your question and interpreted it a completely different way. So in case the above doesn't help:
You could probably write a short little script to separate out the values of the array that are less than 'X' and plot a separate array.
Try something like this:
for i=1:length(myBigArray)
if (myBigArray(i) < 'X')
temp(i) = myBigArray(i);
end
end
plot(temp);
Not the prettiest, but I think it might do what you want. You might also find the matlab function 'find' useful for your application. This function can return the indices of your array that satisfy a condition: find(myBigArray < X)
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Marshall
2013 年 6 月 6 日
I see, sorry for misinterpreting you at first. I understand now.
Does something like this work for you? It will find all indices in Lm less than 0.28 and remove those indices from Lm and Wm. (Note that those values will be permanently removed from Lm and Wm).
index = find(Lm < 0.28)
Lm(index) = [];
Wm(index) = [];
plot(Lm, Wm);
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