How do I iterate through a matrix to switch around data?

This is what I am trying to do:

(a) Step 1: Run the following code.

load fisheriris.mat; X=meas; K=3; n=150; means=X(p(1:3),:);

What these variables are:

–X is the original data

–K is the number of groups/clusters

–n is the number of data points (number of flowers that were measured)

–p takes the original data and reorders it randomly

–means takes 3 data points and sets them to the mean about which we will define the groups

(b) Step 2: Now that your means and data are set up, use your previousfunctions to assign your data points in X to one of the K=3 groups.

(c) Step 3: Now you need to recalculate means for each group. Once you calculate the means, compute distances and reassign groups.

(Hint:sum(X(find(groups==1),:))/length(find(groups==1))will calculate the mean for group 1

(d) Step 4: In a new figure, plot group 1 as red + signs, group 2 as blue x’s and group 3 as green circles using the plot 3 command. Use view(160,50)with your plots to see the data nicely.(e) Step 5: Repeat steps 2 and 3 fifteen times then apply step 4 to see the results.

This is all I have so far, I am so stuck. Please help.

p = ...... (nothing I don't even know what to do with it)

load fisheriris.mat; X=meas; K=3; n=150; means=X(p(1:3),:);