i can not figure out what is wrong with my code,when i call my function it does show eny outpout

function [out,temp]=zari(N)

x1=0; %to plithos Z1

x2=0; %to plithos Z2

x3=0; %to plithos Z3

x4=0; %to plithos Z4

sum1=0;

sum2=0;

sum3=0;

sum4=0;

temp= rand(1,N);

for i=1:N

if temp(i)== 10

out(i)=Z1;

x1=x1+1;

sum1=sum1+out(i);

%Z1 edra zariou = 10

else

if temp(i) == 20

out(i)=Z2;

x2=x2+1;

sum2=sum2+out(i);

%Z2 edra zariou = 20

else

if temp(i) == 30

out(i)=Z3;

x3=x3+1;

sum3=sum3+out(i);

%Z3 edra zariou = 30

else

if temp(i) == 40

out(i)=Z4;

x4=x4+1;%Z4 edra zariou = 40

sum4=sum4+out(i);

end

end

end

end

end

end

Answer 1

[David Sanchez]

Hi Tasos, your nested "ff" conditions only contemplate cases for temp(i) equal to 10, 20, 30 or 40. When temp(i) is differente to any of those values, you have not especified the output.

Besides, your input parameter N is used to create a random 1x N array of number. The function rand(1,N) will return N random numbers in the range [0,1], for wich your temp(i) will always be in the case not contemplated by your nested "if" conditions.

To make you see it clearer, here I send you your code with a simple added line that makes your code work ;):

function [out,temp]=zari(N)

x1=0; %to plithos Z1

x2=0; %to plithos Z2

x3=0; %to plithos Z3

x4=0; %to plithos Z4

sum1=0;

sum2=0;

sum3=0;

sum4=0;

temp= rand(1,N);

for i=1:N

if temp(i)== 10

out(i)=Z1;

x1=x1+1;

sum1=sum1+out(i);

%Z1 edra zariou = 10

else

if temp(i) == 20

out(i)=Z2;

x2=x2+1;

sum2=sum2+out(i);

%Z2 edra zariou = 20

else

if temp(i) == 30

out(i)=Z3;

x3=x3+1;

sum3=sum3+out(i);

%Z3 edra zariou = 30

else

if temp(i) == 40

out(i)=Z4;

x4=x4+1;%Z4 edra zariou = 40

sum4=sum4+out(i);

else

out(i) = 666; % ADDED TO MAKE YOU SEE YOUR MISTAKE

end

end

end

end

[Tasos Apostolopoulos]

my code is about a dice that has only 4 'sides' 10,20 30,40 so when i roll the dice the only possible outcome is 10 or 20 or 30 or 40 right?

[Tasos Apostolopoulos]

never mind i get what you are saying but still when i add out(i)=0; now the outpout shows only 0 0( zeros) is something wrong with my if coditions?

[David Sanchez]

As I told you,

temp= rand(1,N);

will create random numbers whose value is in the range [0 , 1], they will never be greater than 1: you'll never get inside your if conditions.