Community Profile

photo

the cyclist


3.659 total contributions since 2011

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

Contact

the cyclist's Badges

  • Scavenger Finisher
  • 36 Month Streak
  • Thankful Level 3
  • Ace
  • Likeable
  • Famous
  • Quiz Master
  • Revival Level 3
  • Knowledgeable Level 4
  • First Answer
  • Puzzler
  • Speed Demon
  • Creator
  • Promoter
  • Commenter

View all

Contributions in
View by

Answered
Plot and interp using Spline method
It's presumably because you have not chosen your query points to be very close together. Do you get something closer to what you...

alrededor de 13 horas ago | 0

Answered
how can i get activation key
If you are looking to purchase MATLAB products, you could start at the MATLAB store.

1 día ago | 0

Answered
How can I add an expiration date and time to my script or P-code file?
One way that you could do it would be to put a line in your *.m file code that checks the date [using, for example, the now() fu...

3 días ago | 0

Answered
list names in an array
I'm pretty sure there is a better, simpler way to do this, but I believe this does what you want: s = dir; fileList = cellfun(...

5 días ago | 1

Answered
I need some help with arrayfun
I believe that groupsummary is for data stored in tables only. You can do what you want with [sortedResponses,~,idx] = unique(...

6 días ago | 0

Answered
How to do feature selection by maximizing Rsquared for linear regression model ?
I believe you just need to redefine the critfun function from the one in the example: function dev = critfun(X,Y) model = fitg...

8 días ago | 0

Answered
How do I optionally disable code for a missing toolbox?
All credit to Walter, but I believe you'll want to do this test: license('test','Distrib_Computing_Toolbox')

8 días ago | 0

Answered
Why the script of function is always stored in two files ".m" and ".m~"?
It is an auto-saved backup file. See this page for details.

16 días ago | 2

| accepted

Answered
How to plot???
I suggest you take a look at the MATLAB Plot Gallery to find something similar, and use that as a starting point. It looks like ...

18 días ago | 0

Answered
how to calculate integral pdf ?
The probability is the integral of the PDF over a range. You can approximate that integral as a sum: pdf = @(x) 2*x; x1 = 0;...

19 días ago | 0

| accepted

Answered
Error: Cannot set support to 'positive' with non-positive data.
You've checked that your data are non-negative, not they're positive. I'm guessing that you have zeros, and the positive-support...

19 días ago | 1

| accepted

Answered
Do I need to reference matlab in an academic paper?
The most common thing I have seen is to state the software and version used (e.g. MATLAB ver. R2018b), within the Methods sectio...

22 días ago | 0

Answered
Excluding date from date and time
You should be able to use the timeofday function. The resulting output will be a duration array.

23 días ago | 0

Answered
Error in Mosaicing (line 44) new_img(i,k) = N(i,k-Index+1);%%to stich the 2nd image after index. Index exceeds matrix dimensions. what does this mean?
It means that when MATLAB tries to do the operation new_img(i,k) = N(i,k-Index+1); that either new_img is a smaller array tha...

23 días ago | 0

Answered
the command after "if" not work after awhile
My best guess here is that you are running up against the limitations of floating point computation. For example, try putting th...

26 días ago | 2

| accepted

Answered
How do I get a bar chart in the newest version but with the colors from an older version?
There are utilities (e.g. "Digital Color Meter" on a Mac) where you can hover your cursor over a pixel on the screen, and it wil...

26 días ago | 0

Answered
How a matlab function or toolbox works?
A cursory look at the software engineering career postings on the Mathworks site suggests that current development is in C, C++,...

26 días ago | 2

Answered
Random Test Dataset With More Values Of One Type
One simple approach would be: split your dataset into the y=0 set and the y = 1 set do the 80/20 training/test split on the y=...

27 días ago | 1

Answered
is there any way to use both Spearman and Euclidean distance using knnsearch ?
No, they cannot both be used within a single call to knnsearch. I don't really see how "merging" would really be that helpful. ...

27 días ago | 1

| accepted

Answered
How can I separate complex numbers from the other in a matrix?
% Example data z = [1 1+2*i 3 4+5*i] mask = imag(z)==0; The variable mask is a logical variable that is TRUE at the locatio...

alrededor de 1 mes ago | 2

Answered
Finding the locations of non-similar value cells
I'm not certain I understand exactly what you want, but this is my best guess: % Define input arrays CA = {[-10 2],[6;6]}; CB...

alrededor de 2 meses ago | 0

Answered
NIST Randomness test execution
The answer from Peter Perkins here is old, but I believe it is still accurate.

alrededor de 2 meses ago | 0

| accepted

Answered
For every matrix row find rows within the same matrix that have more than one common element in same index below the row
Here is a start at a solution for you. A = [ 1 2 3 1 4 5 3 4 5 1 2 4 1 2 5 2 4 5]; for i = 1:size(A,1)-1 r{i} = f...

alrededor de 2 meses ago | 0

| accepted

Answered
Serious mistake installing Matlab
Does this documentation page about uninstalling MATLAB help?

alrededor de 2 meses ago | 0

Answered
How to write cell arrays in Excel?
I use cellwrite from the File Exchange.

alrededor de 2 meses ago | 0

Answered
I would like to call a row element from a matrix however, the row is written inside another matrix
If T is the temperature matrix, then it sounds like maybe you want to do T(A(1)) Or use a loop to access more rows of T? for ...

alrededor de 2 meses ago | 1

Answered
ismember 0×0 empty logical array to logic
Making a huge guess here, but are you sure you don't mean ~ismember(ID,A) rather than ~ismember(A,ID) Then, assuming ID is a...

2 meses ago | 0

Answered
replace random data with dataset
My best guess at your error is that your randomly generated data consists of two [1 x numP] row vectors, but when you read your ...

2 meses ago | 0

Answered
How to find a polynomial of degree 2 that fits the given data with minimal approximation error? and then sketch discrete points and the graph of the polynomial
You could use the polyfit and plot commands (and of course a few more fundamental calculations like subtraction) to do this.

2 meses ago | 0

Load more