Hi, I am new at using matlab and I was trying to get an expression: y += b;
How would I code this in matlab?
How would I code this in matlab?
Matlab Noob
- Thread starter blustori
- Start date
it shouldn't... lemmie try.
any chance you can post what you already got?
edit: doh I uninstalled matlab
what's the error that you get?
x being a vector
a = size(x);
temp = 0;
for i=1:a
temp(i) = x(i) * y(i); <---
(I'm trying to update the sum each time.)
end
a = size(x);
temp = 0;
for i=1:a
temp(i) = x(i) * y(i); <---
(I'm trying to update the sum each time.)end
Originally posted by: blustori
x being a vector
a = size(x);
temp = 0;
for i=1:a
temp(i) = x(i) * y(i); <---
end
isn't "temp" a scalar? but you used temp(i)
Originally posted by: dighn
Originally posted by: blustori
x being a vector
a = size(x);
temp = 0;
for i=1:a
temp(i) = x(i) * y(i); <---
end
isn't "temp" a scalar? but you used temp(i)
Yeah easy solution is to initialize temp as a vector (presumably you want one of size a with elements to 0) instead of a scalar by doing
temp=zeros(a);
Originally posted by: blustori
x being a vector
a = size(x);
temp = 0;
for i=1:a
temp(i) = x(i) * y(i); <---
end
whats y? another vector? what exactly are you trying to do?
Originally posted by: fawhfe
Originally posted by: dighn
Originally posted by: blustori
x being a vector
a = size(x);
temp = 0;
for i=1:a
temp(i) = x(i) * y(i); <---
end
isn't "temp" a scalar? but you used temp(i)
Yeah easy solution is to initialize temp as a vector (presumably you want one of size a with elements to 0) instead of a scalar by doing
temp=zeros(a);
I thought he meant "temp" to be a sum hence the question about += eg temp = temp + x(i)*y(i)... could be anything though. need more clarification from the OP
Originally posted by: fawhfe
Originally posted by: dighn
Originally posted by: blustori
x being a vector
a = size(x);
temp = 0;
for i=1:a
temp(i) = x(i) * y(i); <---
end
isn't "temp" a scalar? but you used temp(i)
Yeah easy solution is to initialize temp as a vector (presumably you want one of size a with elements to 0) instead of a scalar by doing
temp=zeros(a);
in matlab you dont have to declare variables. since temp(i) is defined by pre-existing variables x(i) and y(i). matlab is cool like that
each of the variables (aka: vectors, scalars, whatever < technical term) need to be defined(at the start of the progam). You should also do this in a .mat file so it will run it as a program.
Such as:
y = 0
b = 0
while y <= 2000
y = y^2 + y
b = b+1
end
Such as:
y = 0
b = 0
while y <= 2000
y = y^2 + y
b = b+1
end
not always true, it depends what you are doing. for while loops, yeah they need to be defined. but for for loops, they dont necessarily need to be declared. in fortran they do.
Originally posted by: blustori
x being a vector
a = size(x);
temp = 0;
for i=1:a
temp(i) = x(i) * y(i); <---
end
are you trying to solve for the dot product of two vectors?
<- confused as to what youre trying to solve
I'm trying to get the dot product of two vectors explicitly so I'm using that for-loop. Anyways, I want a scalar answer and I kind of see where I am going wrong. Can't set vectors = scalars x__x. helps!
any way to print that out to the screen? even better, set it equal to my funtion name lets say:
ans = temp;
end
ans = temp;
end
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