Varying two variables in a for loop for one output

These values are used later on to obtain 1 output that will be plotted in a 3d plot. I want to run a for loop where m(1) is compared to all the n values then the same will happen for m(2) and so on until I get all the possible points.

for index = 1:1:45

n = N_range(index);

m = m_water_range(index);

MW = m/nr;

MG = 1.6/Nr;

[Cris LaPierre]

There are not enough details to provide a solution.

How are you comparing the values? Why are you comparing them? What is the value of nr and Nr? What is your output? Where should your for loop end?

[Michael]

small typo on my part the n and nr are supposed to be the same values. I am trying to get an output of temperature with the m being a mass flow rate and the n being number of channels in a heat exchanger. here are the values of the ranges

m_water_range = linspace(5,40,45);

N_range = linspace(5,50,45);

Answer 1

[Cris LaPierre]

I would remove the for loop and use meshgrid instead.

m_water_range = linspace(5,40,45);   
N_range = linspace(5,50,45);

[m,n] = meshgrid(m_water_range,N_range);
MW = m./n;
MG = 1.6./n;

surf(m,n,MG)

[Michael]

Thanky you this helped