Community Profile

photo

the cyclist


3.976 total contributions since 2011

Data scientist at Cohen Veterans Bioscience; Obsessive runner. Professional Interests: Predictive modeling, statistics. (I don't respond to email via author page, but will usually look at a question if you send me a link to it.)

Contact

the cyclist's Badges

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

View all

Contributions in
View by

Answered
MatLab PCA-LDA Code
If you have the Statistics and Machine Learning Toolbox, then you can use the built-in pca function. I'm not sure what you mean...

alrededor de 6 horas ago | 0

Answered
How to generate rayleigh random variables with specified mean value having minimum value?
If you have the Statistics and Machine Learning Toolbox, then you can generate n Rayleigh-distributed random numbers using the r...

alrededor de 19 horas ago | 0

| accepted

Answered
How can I add line of best fit into my subplots. I have tried to use polyfit but it doesn't work.
As stated in the polyfit documentation, it requires three inputs. (The third input is the degree of the fitting polynomial.) Yo...

alrededor de 23 horas ago | 0

Answered
Getting an error message and don't know how to fix
abs(v) is a vector, so the right-hand side is a vector. You are trying to put that into one element of v on the left-hand side....

1 día ago | 0

| accepted

Answered
Randomly changing a value of a matrix
M = zeros(5,5); M(randi(25)) = 1; This algorithm takes advantage of the power of linear indexing.

1 día ago | 0

| accepted

Answered
find the σ and the μ of the lognormal function, having 1st percentile and the 99th percentile
First you need to understand the math problem, then you can use MATLAB to solve numerically. You can find the CDF of the lognor...

1 día ago | 1

| accepted

Answered
is there a way to flip an array
Yes, the transpose command. xt = x.'; % or xt = transpose(x);

2 días ago | 0

Answered
Find histogram bins at which cumulative histogram has 75% of maximum value
You don't give much detail. Do you have the underlying data, or just the counts from the histogram bins? If you have the data, ...

2 días ago | 1

| accepted

Answered
Combining two tables from different years. Find the duplicates through key column.
Sounds like you could use the ismember command.

2 días ago | 0

Answered
Nested Loops Not Changing with Time
Nothing in your inner for loop depends on n. Things depend on N. So it looks like that inner loop just does the same calculation...

3 días ago | 0

Answered
Counting consecutive repeat values for each row in matrix
First, I would download Jan's RunLength utility from the File Exchange, which was designed to solve exactly this kind of problem...

3 días ago | 1

| accepted

Answered
Working with 1d vector sequences
Still fairly brute-force, but here is a little function that will pad a row or column vector, retaining the orientation: functi...

3 días ago | 0

Answered
Working with 1d vector sequences
v = v(:); will be a column vector regardless of whether it came in as a row or column vector. So, you could "pre-process" your ...

3 días ago | 0

Answered
If I develop a function faster than Matlab built-in function...
First, I would submit it to the File Exchange. Then, I guess you could contact support, using the little icon of the telephone ...

4 días ago | 0

Answered
Plotting planets in MATLAB
You have given very little detail about how your data are stored. There are a few possible ways, depending on that. % Pretend d...

4 días ago | 0

Answered
Display Markers At Specific Data Points
The marker indices functionality was introduced in version R2106b. If you have an older version, then you'll get an error. You ...

4 días ago | 1

Answered
Return rank value of a row
Here is another solution: [~,rank] = ismember(Sscore,sort(Sscore,'desc'));

4 días ago | 1

Answered
Return rank value of a row
[~,idx] = sort(Sscore,'desc'); [~,rank]= sort(idx)

4 días ago | 1

| accepted

Answered
Using find command to find bifurcation points
Here is a loglog plot of the difference between M(1,:) and M(2,:). I think what you are actually trying to do is find the f...

4 días ago | 0

| accepted

Answered
Compare two arrays (intersection) and create new array with output columns, but with repetitions
It's a little convoluted, but this should work: A = [1 3500, 2 100, 2 564, 3 2140, 3 9820, 2 8952] B = [1 0 0 0.5, 2 0 0 0.8, ...

5 días ago | 0

Answered
How to rearrange the output variables for matlabFunction()?
I don't know the answer to your sorting question. However, pulling back to the big picture for a moment, it seems like storing ...

5 días ago | 0

Answered
Matrix manipulation Question - arranging rows
sortrows(a,1) See the documentation for sortrows for details.

6 días ago | 0

Answered
GUIDE MATLAB R2019a
Create a simple app using GUIDE

6 días ago | 0

Answered
How do I generate a matrix from a function?
Here is a better way to do it, without for loops at all: wind_speed_range = 15:5:115; air_temp_range = -60:5:10; [ww,aa] ...

6 días ago | 0

Answered
How do I generate a matrix from a function?
Here is one way to do it, via similar for loops to what you set up. wind_speed_range = 15:5:115; air_temp_range = -60:5:10; ...

6 días ago | 0

Answered
combination of integer numbers
I would download John D'Errico's partitions function, and then I believe your answer is p = partitions(15,[1 1 1 1])

6 días ago | 0

| accepted

Answered
How to re-arrange swapped elements in an estimated vector as compared to a reference vector
Here is a different approach. It relies on the fact that you want the first three inputs to be in ascending numeric order, and i...

6 días ago | 0

| accepted

Answered
Within- & between-subjects in 'anovan'
This documentation page seems to be a pretty exhaustive description of how one can specify the test.

7 días ago | 0

Answered
The lot of plot doesn't shown
In your code, Throughput is just a single value, that gets overwritten during each iteration of the for loop. I'm guessing you ...

7 días ago | 0

Answered
How to plot mean scores of dataset with different number of variables
% Make up some pretend data data = rand(2922,23); % 1-320, 321-655, 656-1001, 1002-1338, 1339-1684, 1685-2027, 2028-2348, 23...

7 días ago | 1

| accepted

Load more