How to step over a loop and go into next iteration & plot graph with different vector length?

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KH 2013-4-3

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Hi,

I have a case which is something like this:

Let's say I have a variable X(i), in a while loop which increases in the multiple of 0.01, means that it's 0.01*i.

For each iteration i, I should be getting a value Y(i) at the end of the iteration.

However, for some of the values X(i), it's not possible in obtaining a value Y(i). So i'd like to step over and go into the next iteration, which is i+1. May I know how do I do that?

Also, at the end of the while loop, i'll need to plot a graph of Y vs X. But because i'm stepping over some X values, which means I'm not getting any values for Y, in the end i'll be getting X and Y of different vector length. In this case, I couldnt get a plot of the graph.

Any ideas how do i do this?

Sorry i couldnt post the code here because it is kind of long.

Hope anyone out there can help me with this.

Thanks

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Answer 1

Mahdi 2013-4-3

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编辑：Mahdi 2013-4-3

在 MATLAB Online 中打开

Why don't you use the interp1() function to get data sets with the same number of points?

If it's not possible, I would suggest using the continue function in the loop.

A simple example would be:

X=[1 2 3 4 5 6 7 8 9]
for s=1:10
if ... % If you can evaluate y
Y(s)=s
else % If you can't evaluate it 
X(s)=[] % Removes the value from the x matrix
continue
end
end

Just a simple example to see how the continue command works

for s=1:10
if s==8
continue
end
i
end

In the above example, we told the loop that if we reach the number 8, then just go back to the beginning of the loop. Running it will show i from 1 to 10, while skipping 8.