Matlab function to take matrix as input and return elements in its four corners as output
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Amos Agbetile
el 6 de Feb. de 2019
Hello, good day all, please I'm having difficulties writing a function to take a matrix input, and return the elements in its cour corners as an output.
Here is my code:
function [top_left,top_right,bottom_left,bottom_right] = corners(i,r,c)
A = matrix(i,r,c)
top_left = A(1,1);
top_right = A(1,c);
bottom_left = A(r,1);
bottom_right = A(r,c);
function B = matrix(i,r,c)
ind = i;
row = r;
col = c;
B = randi(ind,row,col);
I keep getting Not enough input arguments.
Error in corners (line 2)
A = matrix(i,r,c)
I'll appreciate your response. Thanks.
5 comentarios
Jonathan Deepak
el 1 de Oct. de 2020
Editada: DGM
el 12 de Feb. de 2023
you can also use the function like this
function [a,b,c,d]= corners(l)
a= l(1,1);
b=l(1,end);
c=l(end,1);
d=l(end,end);
end
Respuesta aceptada
Matt J
el 7 de Feb. de 2019
Editada: Matt J
el 7 de Feb. de 2019
Maybe this is what you really want:
function Acorners = corners(A)
Acorners=A([1,end],[1,end]);
end
7 comentarios
ANSHUMAN SARTHAK MEHER
el 19 de Sept. de 2020
Acorners=A([1,end],[1,end]); how this helped us? can you please make me understand
Matt J
el 19 de Sept. de 2020
It gets the corners. Did you try it?
>> A=nan(5); A(:)=1:25
A =
1 6 11 16 21
2 7 12 17 22
3 8 13 18 23
4 9 14 19 24
5 10 15 20 25
>> A([1,end],[1,end])
ans =
1 21
5 25
Más respuestas (5)
mayank ghugretkar
el 3 de Jun. de 2019
function [top_left,top_right,bottom_left,bottom_right] = corners(M)
top_left = M(1,1);
top_right = M(1,end);
bottom_left = M(end,1);
bottom_right = M(end,end);
end
here's the code to call:
A = randi(100,4,5)
[top_left, top_right, bottom_left, bottom_right] = corners(A)
B = [1; 2]
[top_left, top_right, bottom_left, bottom_right] = corners(B)
I think this will be much simpler approch..
3 comentarios
ilker melik
el 2 de Mayo de 2020
it gives 4x5 matrix. each element of the matrix take values up to 100.
Matt J
el 6 de Feb. de 2019
Editada: Matt J
el 6 de Feb. de 2019
I get no errors of any kind when I run your code, e.g.
[top_left,top_right,bottom_left,bottom_right] =corners(10,10,10)
gives
top_left =
4
top_right =
7
bottom_left =
7
bottom_right =
4
The only reason I can think of is you have a another function called matrix() higher in your path which is hiding the one you really want. Try,
>>which -all matrix
4 comentarios
Jos (10584)
el 7 de Feb. de 2019
Editada: Jos (10584)
el 7 de Feb. de 2019
Strictly speaking, your function corners does not take a matrix input.
I think you asked to do something like this
function out = corners(M)
% M is the input matrix
out(1) = M(1,1)
% etc
TADA
el 6 de Feb. de 2019
Editada: TADA
el 6 de Feb. de 2019
I Don't See Any Particular Problem With That Line.
The Problem Is Possibly That You Didn't Send Input Or Enough Input To corners When You Invoked It.
Try Calling Cornenrs From The Command Window With Valid Values, Or When You Run Using the Run Button T The Top Or Using F5, You Can Specify Input At The Run Button Menu
0 comentarios
harish kolla
el 16 de Jun. de 2019
function [top_left,top_right,bottom_left,bottom_right]= corners (A)
top_left= A(1,1)
top_right= A(1,end)
bottom_left=A(end,1)
bottom_right=A(end,end)
end
4 comentarios
ilker melik
el 3 de Mayo de 2020
Editada: ilker melik
el 3 de Mayo de 2020
I get this idea of output argument and accesibility. But I defined also top_right, bottom_left and bottom_right as output argument. But why does particularly top_left pops out as an ans instead of other output arguments.
Stephen23
el 7 de Jun. de 2020
"But I defined also top_right, bottom_left and bottom_right as output argument."
You defined them in the function, but you did not use any output arguments when calling the function.
How to call functions (with multiple output arguments) is explained in Steven Lords comment above and also in the introductory tutorials:
nor el houda bouhaddoun
el 19 de Mayo de 2020
please can anybody help me because i don't know where the probleme is :
function [top_left, top_right, bottom_left, bottom_right]= corner(A)
top_left= A(1,1);
top_right= A(1,end);
bottom_left= A(end,1);
bottom_right = A(end, end);
end
and it gives me this:
>> A = randi(100,4,5)
??? Undefined function or method 'randi' for input arguments of type 'double'.
and the m-file is in the current directory
1 comentario
Stephen23
el 19 de Mayo de 2020
@nor el houda bouhaddoun: please show us the output of this command:
which randi -all
What MATLAB version are you using?
Is this your own computer and MATLAB installation, or that of your school/university/whatever ?
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