I am new to matlab.

I am trying to use matlab for a psychology experiment. I obtained data in a matrix with two columns. The first column refers to the distance in cm and the second column to reaction time. The data matrix that I have looks something like this:

`distance = [ 0.1 0.332; 0.2 0.678; 0.1 0.876; 0.3 0.765; 0 0.345; 0.2 0.541; 0.3 0.541; 0.1 0.567; 0.2 0.123;]`

The distance (column 1) can be 0, 0.1, 0.2 or 0.3. I would like separate matrices for each of these distances (so I can compare their reaction times).

I wrote a for loop

`S = 1;T = 1;U = 1;V = 1;for F = 1:length(distance) if distance(F,1) == 0 distance_0(S,1) = distance(F,2); S = S + 1; elseif distance(F,1) == 0.1 distance_1(T) = distance(F,2); T = T + 1; elseif distance(F,1) == 0.2 distance_2(U) = distance(F,2); U = U + 1; else distance(F,1) == 0.3 distance_3(V) = distance(F,2); V = V + 1; endend`

The output should look like this:

`distance_0 = [0.345]distance_1 = [0.332; 0.876; 0.567]distance_2 = [0.678; 0.541; 0.123]distance_3 = [0.765; 0.541]`

However, it is not working well and I don' t get the above output matrices. The matrices distance_* are only filled partly. What am I doing wrong! I hope someone can help me. Thanks in advance.

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