Error using ==> vertcat CAT arguments dimensions are not consistent.

Hi Friends, Thank you for your responses. Major of my work consists of generation of data plot. I am need for a code in which I can vary r_core and r_shell for a fixed value of r_core to find out g from the given equation:

• g=[(r_core+r_shell)^3-r_shell^3]/(r_core+r_shell)^3
• The range of r_shell is 1 to 5.2 with gap 0.26. In each case, the value of r_core is to be varied from 1:1:17. Plot should be r_shell in x-axis, r_core in y-axis and g in z-axis.I also need the data in tabulated form. My code was:

if true
  clear all;
close all;
r_shell=(1:.26:5.2);
for r_core=(1:1:17);
g=((r_core+r_shell).^3-r_shell.^3)./(r_core+r_shell).^3;
end 
tem=[r_shell;r_core;g]';
figure
meshgrid(1:.26:5.2,1:.1:17,g);
xlabel('Shell thickness(nm)')
ylabel('Particle radius(nm)');
zlabel('Murray g factor');
data = [r_shell;r_core;g];
save('data1.tab','tem','-ascii');
end

thank you all, Merry Christmas to you and your family. With love and regards, Hirak

[Jos (10584)]

It would be really helpful when you mention what the code is that produces the error ...

[Hirak]

The error message is the topic itself

Answer 1

[Andrei Bobrov]

Please try this code:

 r1 = (1:.26:5.2)';
 r2 = (1:17)';
 [i1,i2] = ndgrid(r1,r2);
 g=((i2+i1).^3-i1.^3)./(i2+i1).^3;

 mesh(i1,i2,g);
 xlabel('Shell thickness(nm)')
 ylabel('Particle radius(nm)');
 zlabel('Murray g factor');

[Hirak]

Thank you for your kind response. But I am facing a difficulty - using this code , there occur solution for g considering the respective values from each element of the matrix of r1 and r2. What I mean to say, this code computes the value for g taking (r1,r2) as (1,1),(1.26,2),(1.52,3)and so on. but I want to compute g taking the values of(r1,r2)as (1,1),(1,2).....(1.26,1),( 1.26,2)....(1.52,1),(1.52,2)..... for all the 17 elements,which in turn will result in 17*17=139 data points.