converting 3 arrays into matrix

i have 3 different arrays x,y and z and i would like to create one matrix M where the M(i,j)=z(i) and i and j in M are the corresponding x and y values.

Note that x and y are not whole numbers

[Jon]

I'm sorry, but I am having difficulty understanding your verbal description of your problem. Please provide a simple example with arrays x,y,and z and the matrix M that you would like to produce.

Answer 1

[Steven Lord]

You can't have an array in MATLAB whose element indices are non-integer values. If M is a matrix M(3.5, pi) will error (for example.)

What are you planning to do with this "matrix" M? You may need/want to create an object that will allow you to interpolate your data, like a scatteredInterpolant or griddedInterpolant.

If you don't want to perform interpolation but want to be able to map non-integer values to a value you could create a matrix like Adam Danz suggested and use ismember or ismembertol with the 'rows' flag when you need to "index" into that matrix with the non-integer values.

Answer 2

[Adam Danz]

It sounds like you want to horizontally concatenate three column vectors of equal length to form a matrix. If this doesn't demonstrate your question and its solution, please provide an example of the inputs and expected outputs.

x = randi(100,12,1);
y = randi(50, 12,1);
z = randi(15,  12,1);

M = [x,y,z];