Error with using vector(end) to get last index number

I have the following line of code:

if temp_small_time(end) ~= temp_large_time(end)

It's producing an error that says Subscript indices must either be real positive integers or logicals. I just want to know if the value at the end of each vector is the same, but I don't "know" where the end is, thus, I'm using the end keyword. What is wrong here?

[louis rassinfosse]

You can know where the end is by using "length(X)" (if 1 line/column or "size(X)" if it is an MxN matrix ..

[Jadee Kellogg]

I also get the same error when I use length()

if temp_small_time(length(temp_small_time)) ~= temp_large_time(length(temp_large_time))

[louis rassinfosse]

What does your matrixes look like? Could you add the code?

Answer 1

[Star Strider]

Sometimes an error will occur pointing to a line that is not actually where the error occurred. Check the line just before it to see if there’s some sort of problem with that line.

[Jadee Kellogg]

The line before it is the keyword end for an if statement.

[Star Strider]

Since it’s an if block, it would be best to post the entire if block, since the problem would likely occur only if the particular statement was executed.

Seeing the code could give a clue.

Answer 2

[Walter Roberson]

It sounds like you assigned a value to a variable named "end"

[Jadee Kellogg]

The only other place I use "end" is to finish my if statements and for loops.

[Star Strider]

I did that experiment (assigning a variable to ‘end’). MATLAB has serious problems with that, and throws an assignment error.

[Walter Roberson]

Your array is empty. Accessing an empty array at (end) results in that error message.

Answer 3

[Jadee Kellogg]

I figured it out, thanks everyone! I actually emptied by vector earlier in the code on accident so there was no end because there was nothing in it.