but i am getting the error

Problem 3 (halfsum): Feedback: Your program made an error for argument(s) [1 2 3 4 5 6 7 8 9 10] \please help

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function s = halfsum(A)

[row col] = size(A);

if row ~= col

error('Expecting a square matrix here people...');

end

s = 0;

for ii = 1:row

for jj = ii:col

s = s + A(ii,jj);

end

end

Buwaneka Dissanayake
on 21 Jun 2020

function summa = halfsum(M)

[a b] = size(M);

if a>1

for n = 1:a;

for m = 1:b;

if n>m;

M(n,m) = 0;

summa = sum(sum(M));

end

end

end

else

summa = sum(M);

end

end

Joseph Cheng
on 28 May 2015

your input should be

input = [1 2 3;4 5 6;7 8 9]

and not

input = [1 2 3 4 5 6 7 8 9]

Joseph Cheng
on 28 May 2015

Sean de Wolski
on 28 May 2015

f = @(x)sum(sum(triu(x))) % make function

f(magic(3)) % use it

Pragyan Dash
on 19 Sep 2020

%this worked for me. Happy to help!

function summa = halfsum(M)

[row col] = size(M)

summa = 0;

for ii = 1:row;

for jj = 1:col;

if jj >= ii;

summa = summa + M(ii, jj);

end

end

end

Srishti Saha
on 7 Apr 2018

This code works perfectly for me:

%function to compute sum of lower most right side triangle in an X*2 matrix

function u = halfsum(P)

u1 = P(end:-1:1, 1:end);

u2 = triu(u1);

u = sum(u2(:));

end

Ajith Bharadwaj
on 3 Feb 2020

function summa = halfsum(A)

[row col] = size(A);

for ii = 1:row

for jj = ii:col

summa = summa + A(ii,jj);

end

end

Amit Jain
on 3 Nov 2020

ERTIZA HOSSAIN SHOPNIL
on 21 May 2020

function summa=halfsum(A)

t=triu(A);

list=sum(t);

s=0;

for n=list

s=s+n;

end

summa=s;

end

Rik
on 24 Aug 2020

That means you will have to copy another answer to cheat on your homework. Or think yourself.

saurav Tiwari
on 25 Jun 2020

function summa=halfsum(a)

[m,n]=size(a)

for i=1:m

j=1:n

x(i)=sum(a(i,j))

end

summa=sum(x)

end

Walter Roberson
on 25 Jun 2020

youssef boudhaouia
on 27 Jul 2020

A solution with double For-loop:

function summa=halfsum(M)

summa=0;

s=size(M);

for i=1:s(1)

for j=1:s(2)

if j>=i

summa=summa+M(i,j);

else

summa=summa;

end

end

end

Abdul Quadir Khan
on 18 Oct 2020

function summa = halfsum(x)

[row,col] = size(x);

allsum=0;

for n=1:row

for c=n:col

allsum=x(n,c)+allsum;

end

end

summa=allsum;

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