Error Accessing Index - Told index must be positive or logical, however it is both...

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Shawn
Shawn 2012-7-17
I am using a forloop to pull out values of one vector based on indecies specified by a second vector. My trial array is 500x6 and my events vector is 4x1 of two decimal numbers (i.e - 1.23, 3.42, 4.89). For certain columns in my trial array, I want to reset the start point to 0 and adjust all values in that cycle accordingly Here is what my code looks like
for cycle = 1:(length(events)-1)
initial_value = trial(events(cycle)*100, 11)
plot(linspace(0,1,100)*100, (interp1(linspace(0,1,length(trial(events(cycle)*100:events(cycle+1)*100, 11))), (trial(events(cycle)*100:events(cycle+1)*100, 11)-initial_value), linspace(0,1,100))))
end
When I do this, I get this error message:
Attempted to access trial(253,11); index must be a positive integer or logical.
However, my trial file does indeed contain the index 253, 11. Any ideas why I am getting this error?

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采纳的回答

Andreas Goser
Andreas Goser 2012-7-17
Maybe it is not exactly and integer, like 1.0000001.

更多回答（2 个）

Sean de Wolski
Sean de Wolski 2012-7-17
dbstop if error
Then wait until it errors and inspect your variables.
format long
will likely show you that Andreas' is correct.
Shawn
Shawn 2012-7-17
I put in a round function on my events variable and it seems to have fixed it. I guess after looking for all the complicated answers I looked right past the simple one! Thank you

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