MATLAB: How to plot 2D graph

arrayMATLABplot

Hi,
Here is the question;
and I want to calculate plot x-t-F graph for first 100 terms of n.
Sum=0;
for t=1:20
for x=1:20
    
for n=1:100
    Sum=Sum+(30/pi)*(1/n)*(exp(-(n^2)*(pi^2)*1.14*t/3600))*(1-cos(n*pi/2))*(sin(n*pi*x/60));
end
end;
sum(t)=Sum;
end;
Here is my code. I am quite new in matlab and I wanted to do it with for loops. I want to ask that is there any way to take the values of x and t randomly between intervals and find the F function for each time and plot them?
Thank you!

Best Answer

If I understand correctly what you want to do, this should work: 
for t=1:20
    for x=1:20
        Sum=0;
        for n=1:100
            Sum=Sum+(30/pi)*(1/n)*(exp(-(n^2)*(pi^2)*1.14*t/3600))*(1-cos(n*pi/2))*(sin(n*pi*x/60));
        end
        accsum(x,t)=Sum;
    end
end
figure
meshc((1:20),(1:20),accsum)
grid on
xlabel('x')
ylabel('t')
zlabel('F(x,t)')
view(-130, 30)
.
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