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the cyclist


3,796 total contributions since 2011

Data scientist at Cohen Veterans Bioscience; Obsessive runner. Professional Interests: Predictive modeling, statistics.

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Answered
Cell to matrix average
I believe this does what you want: B = squeeze(mean(reshape(cell2mat(A),93,145,147,19)));

약 13시간 ago | 0

Answered
Delete rows in intervall
If your vector is a multiple of 7 in length, then this will work: x = reshape(x,7,[]); x = x(1:4,:); x = x(:);

약 17시간 ago | 0

Answered
Bin data in a strange way
% Simulate some data data = [0; 0; -10; -2766; -5600; -5535]; % Define bin centers binCenter = [ 0, -2765, -5530, -8295, -...

약 19시간 ago | 0

| accepted

Answered
How to extract first non-zero element in each column and put into a new array
Here is one way: in=[0 0 6 0 0 5; 1 3 5 1 0 4; 4 4 5 3 4 5]; [m,n] = size(in); out = nan(1,n); for nc = 1:n ...

1일 ago | 0

Answered
How to extract first non-zero element in each column and put into a new array
Here is one way: in=[0 0 6 0 0 5; 1 3 5 1 0 4; 4 4 5 3 4 5]; mid = in; for nr = size(in,1)-1:-1:1 mid(nr,...

1일 ago | 0

Answered
How to extract first non-zero element in each column and put into a new array
Here is a one way: in=[0 0 6 0 0 5; 1 3 5 1 0 4; 4 4 5 3 4 5]; [m,n] = size(in); [i,j] = find(in); [~,jj] =...

1일 ago | 0

Answered
for loop to create a vector V of the squares
Because this is a very basic MATLAB question, and you don't even know how to start, I would recommending watching the MATLAB Onr...

1일 ago | 0

Answered
How do I determine which model fits my data the best?
The second output from the fit command gives goodness-of-fit statistics. You might also take a look at "Determing the Best Fit"...

1일 ago | 0

Answered
Plotting circles in a for loop using a time step
Your code runs fine for me, and creates a figure. What's the problem? What's your question? I'm going to take a stab at an answ...

1일 ago | 0

Answered
Find the cell index in a nested cell array, corresponding to a string (by using strcmp)
Here is a one-liner: cellfun(@(y)any(any(cellfun(@(x)isequal(x,{'BLUE'}),y))),A) I stumbled across this function for dealing w...

1일 ago | 0

Answered
sorting matrix in ascending order based on column 1 (and ascending order also for column 2)
Use the sortrows command. B = sortrows(A,1);

4일 ago | 0

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Answered
How do I create a 1x21 matrix where the inputs are all the different values of d
Does this code do what you had intended? (There was some guesswork on my part.) B=[1 2 3 4 5 6 7; 9 11 13 15 17 19 21]; Norm...

4일 ago | 0

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Answered
Reading through folders getting the warning : ." Index in position 1 exceeds array bounds (must not exceed 1).".
At some point, did you define a variable named dir? MATLAB would then try to access that variable, rather than the command. Clea...

4일 ago | 0

| accepted

Answered
Plotting within a nested for loop
I'm guessing you wanted something like plot(x2,y,'.') or possibly plot(x2,y)

4일 ago | 0

Answered
How can I count the largest number of repeated numbers in a double?
I recommend downloading the RunLength utility from the File Exchange.

4일 ago | 0

Answered
What is difference between isequal and == in comparing two vectors
isequal will return a single logical value, indicating whether or not the two vectors are identical. == will give a vector with...

4일 ago | 3

Answered
how to create a for loop 380:780?
I would use a cell array, not variable names that also encode an index: for ic = 380:780 CM4{ic} = spec_data(spec_data.wav...

4일 ago | 0

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Answered
What does this command mean?
I'm guessing it's this.

5일 ago | 0

Answered
Confidence interval in Linear Regression
I'm curious why you want to code them from scratch, but the formulas for the standard errors and confidence intervals for the sl...

5일 ago | 0

Answered
find possible combinations of each row of matrix and allocate their respective values into 2 different matrices
% The input data A = [0.3939 0.3116]; B = [1 16 17 6 9 0 0 0 0 0 0 0 0 0 1 16 17 6 7 8 10 0 0 0 0 0 0 0 ]; ...

6일 ago | 0

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Answered
Is it possible to draw a bar plot with percentage lines?
I'm not sure if you are asking for them to be automatically positioned, but there are many options for drawing lines on a plot: ...

6일 ago | 1

Answered
Having trouble getting legend to display properly
One possibility is to set the 'Visible' property of those axes to 'off'. Here is a simpler example ... figure plot(magic(3)) ...

6일 ago | 0

Answered
Refund on MatLab purchase
You should contact sales.

6일 ago | 2

Answered
How to shorten my data in the struct I have?
The problem is that you are trying to resize your variable "in place". You can't really do this in pieces. One solution would b...

6일 ago | 1

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Answered
Sensitivity-Specificity of clustering result (no labeled data)
I was really tempted to just write the one-word answer, "No". But, instead I'll say that I just don't see how it could be possi...

7일 ago | 0

Answered
how do I get the values of a matrix using movsum to add 90 consectuive cells in the matrix?
This task will be trivial if you use the RunLength utility from the File Exchange.

7일 ago | 0

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Answered
Fill an array over an iteration
Does using BBB(i,:)=Dstop instead of BBB(i,:)=B(:) do what you want? If not, you need to explain a bit more.

8일 ago | 0

| accepted

Answered
How to to report row at which the difference reaches below a threshold?
Probably the hardest part will be defining the exact rule for "sufficiently small difference". After that, I think something lik...

9일 ago | 0

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Answered
Take values from a matrix, line by line.
I would do this as follows: WDV = exp(A.'); and any time later I need to refer to "W", I would reference WDV(:,1). If you abs...

11일 ago | 0

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Answered
Unable to debug the problem in the code.
I'm guessing it's a problem with floating-point precision when you do this comparison: (time-flag*carrier_time_period)== carrie...

11일 ago | 1

| accepted

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