getting error as Matrix dimensions must agree.

Question

nikhil 2020-5-15

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/525811-getting-error-as-matrix-dimensions-must-agree

评论： nikhil 2020-5-16

Hi all,

i am trying to solve the above equation in matlab, but i am getting an error as matrix dimensions must agree while solving the code

any suggestions and thanks in advance

clc;
clear;
format short;
ro = 17.5; % op.ra
R = 65; b= 1.225*ro; % radius of cylinder
r = b:5:R; % let us divdie r values into two section upto b point
ro_bar= ro/R; %dimensionless variable
x1 = r/R; % set of point from radius and b point
b1 = ro:0.45:b;
r_b1 = b1/R; % set of points from b point to op.ra
alp= asind(ro/R);
% let us make two divisions
func1 = @(r)((r.^3)./(sqrt((x1).^2) - ((ro_bar).^2) - (((x1).^6).*(1-((ro_bar).^2)))));
i = zeros(size(x1));
for c = 1:length(x1)
i(c) = integral(func1,0,x1(c));
end

2 个评论
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Ameer Hamza 2020-5-16

Can you show your integral equation in MATLAB form? You can attach it as an image.

nikhil 2020-5-16

Sir, i consider only integral part of equation

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Answer 1

Walter Roberson 2020-5-16

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https://ww2.mathworks.cn/matlabcentral/answers/525811-getting-error-as-matrix-dimensions-must-agree#answer_432736

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ro = 17.5; % op.ra
R = 65; b= 1.225*ro; % radius of cylinder
r = b:5:R; % let us divdie r values into two section upto b point
ro_bar= ro/R; %dimensionless variable
x1 = r/R; % set of point from radius and b point
b1 = ro:0.45:b;
r_b1 = b1/R; % set of points from b point to op.ra
alp= asind(ro/R);
i = zeros(size(x1));
for c = 1:numel(x1)
  func1 = @(r)((r.^3)./(sqrt((x1(c)).^2) - ((ro_bar).^2) - (((x1(c)).^6).*(1-((ro_bar).^2)))));
  i(c) = integral(func1,0,x1(c));
end