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sas0701


Active since 2011

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corrcoef - p-value calculation
Hi, I understand. this is for a paper. I want to describe in one sentence how the significance was calculated for the correlatio...

10 years ago | 0

Question


corrcoef - p-value calculation
Hi, I have read the description. "The p-value is computed by transforming the correlation to create a t statistic having n-2 de...

10 years ago | 2 answers | 0

2

answers

Question


svd, pca - linear transformation
Hi, I used to do the following.. [U,SS,V] = svd(Y*Y'); W = sqrt(SS); w = diag(W); L = diag(1./w)*U'; T = L*Y; ...

10 years ago | 0 answers | 0

0

answers

Question


Multiple correlation coefficient - R, R^2
Hi, I am trying to calculate this: http://en.wikipedia.org/wiki/Multiple_correlation I have 3 orthogonal predictor variabl...

10 years ago | 1 answer | 0

1

answer

Question


svd - what are the principal components?
Hi, I have X = [25, 2000] i.e. 25 subjects and 2000 values (i.e. each subject has a spectrogram that is reduced to 2000 values...

10 years ago | 1 answer | 0

1

answer

Question


PCA, svd, compare two groups.
Hi, I have group 1 with 25x2000 (i.e. 25 variables and 2000 samples) [u,s,v]=svd(group1) gives me u=25x25, s = 25x2000 and...

10 years ago | 0 answers | 0

0

answers

Question


Matrix manipulation - smarter way to do this?
So, 1st column has trials from 1:300 but for each of the values there are multiple rows (this are samples in time - msecs).. ...

11 years ago | 1 answer | 0

1

answer

Question


Textscan - how to handle blocks
Hello, I have a large .txt file with hundreds on lines that look like this.. "abcd_1" 54 22 0 0 215.00 584.70 382.10 . . . . ...

11 years ago | 2 answers | 0

2

answers

Question


Trouble importing large .txt file
Hi, I have a 700 MB text file with strings and numbers. I am using the gui - import data. It takes a couple secs (blue/white bar...

11 years ago | 0 answers | 0

0

answers

Question


Automate mass open and process: string issue
Hello, I am sure this is a simple answer but I don't know it. I have ~ 175 datasets with names like this 1400075_03_D.txt ...

11 years ago | 1 answer | 0

1

answer

Question


actxserver (Excel) error : Windows
Hi, I am running Matlab_R2007b on Windows 7. When I try >> Excel = actxserver('Excel.Application') ??? Error using ==>...

11 years ago | 0 answers | 0

0

answers

Question


MIssing actxserver function for xlswrite?
Hi, I just tried xlswrite and it looks like I am missing actxserver in both R2013(mac) and R2007b(windows). Not sure why but if ...

11 years ago | 2 answers | 0

2

answers

Answered
extract from text file
Hi, What I need is this: 00:00:00 00:00:00 Exam Start 00:00:00 00:00:00 Impedance - Impedance Values 00:00:23 00:00...

11 years ago | 0

Answered
extract from text file
Sorry here goes again - First line is Event List, there is an empty line between Event List and Patient Name also.So I basically...

11 years ago | 0

Question


extract from text file
Hi, I am trying to use Matlab for this because I have ~300 files for which this needs to be done.. The data in the .txt file ...

11 years ago | 4 answers | 0

4

answers

Question


Bar graphs - draw a box..
a = rand(1,100) Er=std(a); bar(sort(a)) Now, I want to drop a box or some other indicator to indicate the values of a...

11 years ago | 1 answer | 0

1

answer

Answered
Bar graphs - color coding..
Hi, For reasons beyond my control , I need to specify the colors colors = [0 0 1; %blue 1 0 1; %magenta 0 1 0; %green 1 0 0;...

11 years ago | 0

Question


Bar graphs - color coding..
Hello, I need to color code my bar graph. a = [10 20 30 25 15] b = [1 3 2 1 4] bar(a) BUT, I want a(1) and a(4) t...

11 years ago | 2 answers | 0

2

answers

Question


Modifying vectors for plotting...
Hi I have the following vectors x(:,1) = 1 1 2 2 3 4 4 5 6 6 … 120 etc; % There is no pattern. These are the session #s. ...

11 years ago | 0 answers | 0

0

answers

Question


ttest - 2 matrices
Hello, I have 2 matrices 52x21x49. Here x=52, y=21 and each of these 'tiles' have 49 values. I want to do a ttest on each ...

12 years ago | 1 answer | 0

1

answer

Answered
Modify colorbar in .fig file
Hi, Anybody? Want to modify CLim in a saved figure without regenerating it. Thanks,

13 years ago | 0

Answered
Modify colorbar in .fig file
I am trying to modify the CLim in the above saved figure..i.e. without creating a new figure.

13 years ago | 0

Answered
Modify colorbar in .fig file
Hi, Please see attached file here: http://fileslap.com/9hn/Coh070911fx

13 years ago | 0

Answered
Modify colorbar in .fig file
Hi, I tried both ways.I first open up a saved .fig file 1)caxis does not change anything 2)set(h...) changes colorbar lim...

13 years ago | 0

Answered
Modify colorbar in .fig file
Hi, Do I have to something special in terms of loading the figure (just opening it up and typing caxis does not work)? Thanks...

13 years ago | 0

Question


Modify colorbar in .fig file
Hello, Is there anyway to rescale the colors in a figure and hence the colorbar? eg. Right now colorbar is 0.1 to 0.5 BUT...

13 years ago | 7 answers | 0

7

answers

Answered
Statistical analysis: Comparison and false discovery rate.
Hi, a1.. a4 are independent variables at 1 time point. Not from the same distribution. eg. student math scores during midterms. ...

13 years ago | 0

Question


Statistical analysis: Comparison and false discovery rate.
Hello, This might be very trivial so please bear with me. A = [a1 a2 a3 a4] B = [b1 b2 b3 b4] Ho = [A-B]^2 = 0 i.e. A...

13 years ago | 2 answers | 0

2

answers