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How to call the element in a unknown 2-dim matrix???^_^

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Manqiao Wang
Manqiao Wang 2015-10-9
评论： Manqiao Wang 2015-10-10
This is my first time to use the Matlab. I want to do operations on each element(the index doesn't really matter). However I don't know how to call them if I don't now the size. I should use for or while, and how? （≧∇≦） Btw, I also want to ensure , will the function return 6666 if I tap "disp(6666)"? Thanks a lot~ :)
  1 个评论
James Tursa
James Tursa 2015-10-9
Please be more specific. Maybe give a short example showing the inputs and your desired output.

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采纳的回答

Stalin Samuel
Stalin Samuel 2015-10-9
a = randi(2,2);%%your matrix
[r c] = size(a);%%returs no of rows and columns in the matrix a
disp('-------the matrix elements are----')
%%print the elements
for i = 1:r
for j = 1:c
disp(sprintf('%d\n',a(i,j)))
end
end
%%multiply 'a' by 3
a= 3*a

更多回答（1 个）

Walter Roberson
Walter Roberson 2015-10-9
x = 1 : 50;
for K = 1 : length(x)
y(K) = x(K).^3 - 10*x(K).^2 - 5;
end
y2 = x.^3 - 10*x.^2 - 5; %same result as y to within roundoff error

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