how do i fix this Unable to perform assignment because the left and right sides have a different number of elements.

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Peter Beaini 2019-8-14

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https://ww2.mathworks.cn/matlabcentral/answers/476054-how-do-i-fix-this-unable-to-perform-assignment-because-the-left-and-right-sides-have-a-different-num

回答： Prasad Parameswaran 2019-10-22

 x(i+1) = x(i) + h;
    % euler forward
   ye= y0+h*f(x0,y0);
   
   f_newton = @(yvar) yvar-y-h*f(x(i+1),yvar);
    df_newton = @(yvar) 1-h*dfdy(x(i+1),yvar);
    
    
    y(i+1) = NewtonsMethod(f_newton, df_newton,ye, tol);

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KSSV 2019-8-14

Show us the complete code. This error is due to dimensions mis match.

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Answer 1

Prasad Parameswaran 2019-10-22

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https://ww2.mathworks.cn/matlabcentral/answers/476054-how-do-i-fix-this-unable-to-perform-assignment-because-the-left-and-right-sides-have-a-different-num#answer_397614

This is because of dimension mismatch. This can be resolved by initialiszing the variables. If the dimension of variable(say x) is known (for example m x n) initiallize " x = zeros(m,n)". Do this for all the variables. If not able to solve the issue share the whole code.