Community Profile # Nuchto

27 total contributions since 2012

Professional Interests: Engineering

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Question

fft second argument function matlab
Hi, To do the fft I noticed in my homework the second argument is the sampling frequency but I don't understand why. Anyone ...

2 years ago | 2 answers | 0

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Question

ANOVAN with possibility of matrix as an input (columns as the variables)
Hi, I have my variables in columns in a long matrix (2000x 25), and need to test which of the variables are statistically differ...

2 years ago | 1 answer | 0

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Question

How to standardize unstandardized beta coefficients
Hi, I read once that unstandardized beta coefficients (from regress function) can be standardized by just dividing them by the s...

2 years ago | 3 answers | 0

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Question

normalize between -1 > x > 1 (not equal to -1 or 1)
How to normalize values so that they fall within -1 and 1 (but no values should be equal either -1 or 1). Thank you.

2 years ago | 1 answer | 0

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Question

whitening matrix as output PCA
Is the whitening matrix given as an output in Matlab? Thank you.

4 years ago | 2 answers | 0

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Question

EPS export not keeping text font
I am trying to save as EPS a plot where I have used the text() function with FontType Wingdings, but when export to the EPS file...

5 years ago | 0 answers | 0

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Question

Sine wave changing amplitude
Can you have a sine wave with varying amplitudes? I think this concept does not exist.

5 years ago | 3 answers | 0

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Question

logarithmically spaced vector in a certain range
How to create a logarithmically spaced vector say from values 3 to 10? Thank you!

5 years ago | 3 answers | 0

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Question

How are Spearman p values calculated?
The p-values from the corr function (Spearman), how are computed? Is there any refernce paper I could access?

5 years ago | 1 answer | 1

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Question

Basics of fminsearch to be explained in laymens terms
Could someone explain me in layman's terms this function? For instance, in the example: X = fminsearch(@sin,3) Thank you, ...

6 years ago | 1 answer | 0

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Question

Where is the short-cut in Matlab 2013a to comment?
It used to be shift+CMD+/, but now this is for HELP. And I can't seem to find this. Anyone help! :)

6 years ago | 4 answers | 2

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Question

Where is the intercept in regress
When you use the "regress" function, where is the intercept?

6 years ago | 1 answer | 0

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Question

r = randi(10,100,1) but using non-uniform distribution
How to create random number from a range non-uniformly distributed? Thanks!

7 years ago | 1 answer | 0

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Question

imwrite plots not saving
I don't seem to save with imwrite a plot. Is this possible at all?

7 years ago | 3 answers | 0

### 3

Question

Correlation: is this correct?
ans ans ans

7 years ago | 1 answer | 0

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Deleted questions
Can the author of a question delete it? I would like to delete some of my questions since they are silly.

7 years ago | 3

Question

SURF 2D. How is possible.
How is that SURF makes 3D plots of 2D data? What data is suited for this? Newbie alert :)

7 years ago | 2 answers | 0

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Length of the longest continuous string of the same number
How to do this but for the longest consecutive sequence (1, 2, 3, 4, 5, 10, 14: here n = 5). Thanks!

7 years ago | 0

Question

Column of ONES in multiple regression
What is the meaning of adding a column of ones in the multiple regression? Thanks a lot, G.

7 years ago | 3 answers | 1

### 3

Output 'y' from wavread(filename): what is it?
Thank you so much!

7 years ago | 1

Question

Output 'y' from wavread(filename): what is it?
I was wondering what exactly is the data stored in two columuns by y. If, for instance, I run y = wavread(a, 44100) (my file ha...

7 years ago | 3 answers | 0

### 3

Question

p value to z score
How do I determine the z score from a p value? Thanks!

7 years ago | 2 answers | 0

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Question

why eq says they are not equal
I have two equal vectors a = b. When I check for equality: y = eq(a, b) find(y==0) I get most of values, meaning they...

7 years ago | 3 answers | 0

### 3

Question

One r2 for each beta column/predictor
Hi, The 'stats' output from regress returns a 1x4 vector, first value of which is r2. If you do regress(Y,X) where X is not o...

7 years ago | 2 answers | 0

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Question

for and parfor
Simple question: why does FOR exist at all if we have PARFOR (which performs better and faster)?

7 years ago | 3 answers | 0

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Question

Normalize to unit norm
I have a variable containing a probability distribution (just an one-dimensional array of values). How can I normalize a to unit...

7 years ago | 1 answer | 1