Matlab hm

hm.m

1)
len = size(M)(1)
M(1) + M(len) + M(len*len - (len + 1)) + M(len*len)

2)
sum(sum(M))

3)
function (m,n)
	eye(m,n)
end

4)
function get_sum(M)
	[m, n] = size(M)
	v = zeros(1, m)
	for i=1:m*n
		if i < m*(n-1)
			v(floor(i/n) + 1) += M(i)
		else
			v(m) += M(i)
		end
	end
end

5)
function M = swap(M, o, n)
    [m, n] = size(M)
    c = 0
    for i=1:(m*n)
        if M(i) == o
            M(i) == n
            c += 1
        end
    end
end

6)
function p = get_pi(n=100)
    p = 0
    for k=0:n
        p += ((-3)**(-k))/(2*k+1)
    end
    p = sqrt(12) * p
end

7)
function odd, even = pariry(mat)
    odd = []
    even = []
    [m, n] = size(mat)
    for i=1:(m*n)
        if mat(i) % 2 == 0
            even = [even, mat(i)]
        else
            odd = [odd, mat(i)]
        end
    end
end

8)
function res = calc(n, t)
    res = 0
    for k=1:n
        res += (sin((2*k - 1) * 5))/(2*k - 1)
    end
end