Matlab cannot produce result

.

function Y = myFunction(d,n,theta)

Y = coinflip(100,100,0.25); 

d = 100;

n = 100;

theta = 0.25;

Y = [ ];

for Dloop = 1:d

for Nloop = 1:n

X =randn(1);

Y = [Y;X];

end

end

Y(Y<theta) = 0;

Y(Y>theta) = 1;

histogram(Y)

(I get some errors as below -)

 function Y = myFunction(d,n,theta)
 ↑
 Error: Function definition not supported in this context. 
 Create functions in code file.

(another error is as below)

Error in myFunction (line 2)

Y = coinflip(100,100,0.25);

(other error is as below)

Y = coinflip(100,100,0.25);

Undefined function or variable 'coinflip'.

.

Here please help me to modify the errors and able to produce one correct output graph

.

[sloppydisk]

The error messages are very descriptive. You cannot create a function in the command window and coinflip is not defined.

You probably meant to do this:

d= 100; 
n = 100; 
theta = 0.25; 

output = coinflip(d,n,theta);

function Y = coinflip(d,n,theta) 
Y = zeros(d*n, 1); 
for Nloop = 1:n 
    for Dloop = 1:d 
        Y(Nloop*Dloop) = rand; 
    end
end
Y(Y<theta) = 0;
Y(Y>theta) = 1; 
histogram(Y)
end

You should also preallocate Y as I showed. Not sure why you want a nested for loop or what your plans are though.

[vokoyo]

To Jasper Gerritsen

Your programming is not correct

Undefined function or variable 'coinflip'.

[sloppydisk]

That's because you pasted it into the command window. You can't define functions in there, so instead you should save the code as an m-file and execute it in the editor.

[vokoyo]

I understand but get same problems

Undefined function or variable 'coinflip'.

Can I use another code - do not want using function

[Image Analyst]

Then define it. It's not built into MATLAB, so you need to define what that function does.

[vokoyo]

How to define

Please do not waste any time

Write useful code show to me and save time

[sloppydisk]

Much love to you my man, but I hope you will adopt a better attitude, because I don't think you're going to learn much this way.

[vokoyo]

I understand but I need to finish my task urgently

Other people they talk so many but mostly useless

Please help as best as you can

[Image Analyst]

He already did help you and wrote some code that seems like it does what you want to do. I ran it (the attached code) and it ran fine. What did you do differently????

[sloppydisk]

He pasted it into the command window :D

[vokoyo]

function Y = myFunction(d,n,theta)

Y = coinflip(100,100,0.25); 

d = 100;

n = 100;

theta = 0.25;

Y = [ ];

for Dloop = 1:d

for Nloop = 1:n

X = randn(1);

Y = [Y;X];

end

end

Y(Y<theta) = 0;

Y(Y>theta) = 1;

histogram(Y)

Now I can run but the output graph why show some negative numbers?

[vokoyo]

Kindly please refer to the attached file - Computer Project

[Image Analyst]

There are no negative numbers. There is a bar centered at 0 with 8000 counts, and one centered at 1 with 2000 counts. If you want the x axis to show only the bar centers, then add this line as the last line of your coinflip() function:

xticks(0:1)

[vokoyo]

Sorry I cannot understand

Can you please show all the detail information

I would like to compare it to the two graphs (in attached file Question 2)

[vokoyo]

Matlab Programming - I am not sure how to modify it to get the two graphs in Question 2

(1)

function Y = myFunction(d,n,theta)
Y = coinflip(100,100,0.25); 
d = 100;
n = 100;
theta = 0.25;
Y = [ ];
for Dloop = 1:d
for Nloop = 1:n
X =rand(1);
Y = [Y;X];
end
end
Y(Y<theta) = 0;
Y(Y>theta) = 1;
histogram(Y)
xticks(0:1)

function Y = myFunction(d,n,theta)
Y = coinflip(100,100,0.5); 
d = 100;
n = 100;
theta = 0.5;
Y = [ ];
for Dloop = 1:d
for Nloop = 1:n
X =rand(1);
Y = [Y;X];
end
end
Y(Y<theta) = 0;
Y(Y>theta) = 1;
histogram(Y)
xticks(0:1)

(2)

function Y = myFunction(d,n,theta)
Y = coinflip(10,1000,0.25); 
d = 10;
n = 1000;
theta = 0.25;
Y = [ ];
for Dloop = 1:d
for Nloop = 1:n
X =rand(1);
Y = [Y;X];
end
end
Y(Y<theta) = 0;
Y(Y>theta) = 1;
histogram(Y)
xticks(0:1)

function Y = myFunction(d,n,theta)
Y = coinflip(10,1000,0.5); 
d = 10;
n = 1000;
theta = 0.5;
Y = [ ];
for Dloop = 1:d
for Nloop = 1:n
X =rand(1);
Y = [Y;X];
end
end
Y(Y<theta) = 0;
Y(Y>theta) = 1;
histogram(Y)
xticks(0:1)

(3)

function Y = myFunction(d,n,theta)
Y = coinflip(100,1000,0.25); 
d = 100;
n = 1000;
theta = 0.25;
Y = [ ];
for Dloop = 1:d
for Nloop = 1:n
X =rand(1);
Y = [Y;X];
end
end
Y(Y<theta) = 0;
Y(Y>theta) = 1;
histogram(Y)
xticks(0:1)

function Y = myFunction(d,n,theta)
Y = coinflip(100,1000,0.5); 
d = 100;
n = 1000;
theta = 0.5;
Y = [ ];
for Dloop = 1:d
for Nloop = 1:n
X =rand(1);
Y = [Y;X];
end
end
Y(Y<theta) = 0;
Y(Y>theta) = 1;
histogram(Y)
xticks(0:1)