Community Profile

photo

the cyclist


3.935 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
Correlation between two matrices
One possibility, which ignores any element for which A or B is NaN, is corrcoef(A,B,'rows','complete')

etwa 11 Stunden ago | 1

Answered
How to re-arrange swapped elements in an estimated vector as compared to a reference vector
% Inputs u=[0.5 1 1.5 0.6981 1.3962 1.5707]; Est1=[0.499 1.002 1.5001 0.6890 1.3880 1.49998]; Est2=[0.9999 0....

etwa 13 Stunden ago | 0

Answered
predicting CO2 using given data
Do you have the Statistic and Machine Learning Toolbox? If so then you could fit a simple linear model to your data like this: ...

etwa 13 Stunden ago | 0

Answered
How to plot over a range using absolute value
One way to do it would be to create a grid that is larger than the one you need, but then overwrite the x-y grid values that do ...

ein Tag ago | 1

| accepted

Answered
Unpack arrayfun output into different variables
No, it is not possible. It is true that the output of arrayfun in this case is a 1x3 cell array. And you may feel that it is ob...

3 Tage ago | 0

| accepted

Answered
Disappear of z coordinate when plotting 3D
I think you can "manually" fix this by setting the view. For example, try view(15,15) after the plot is made. I've seen a cou...

3 Tage ago | 0

Answered
Helper Feature Vector2 Sequence
Do you have the Audio Toolbox installed? If you type ver at the command window prompt, do you see the Audio Toolbox listed?

4 Tage ago | 0

Answered
Plot range with semilogx
You needed element-wise instead of matrix division in these two lines: eta = (EfEm - 1)./(EfEm + xi); y70 = (1 + xi * eta * .7...

5 Tage ago | 1

| accepted

Answered
Hi, how can i proceed with this question, everytime i plot it, it doesn't show me my line. Can u guys help me
It's because you used a matrix division instead of an element-wise division to calculate y. Try this instead: y = (exp(x)./ sin...

6 Tage ago | 0

Answered
Multivariate Gaussian user defined function
I made a few changes: Define L as the first column of X, not just first value Ditto Y for second column Changed a couple matr...

6 Tage ago | 0

| accepted

Answered
VariableNames for table that begins with number
Yes. tbl = table([1;2;3],'VariableName',{'123abc'})

6 Tage ago | 0

| accepted

Answered
Quantile regression in Matlab
I am unaware of any built-in functions in MATLAB (including the Statistics and Machine Learning Toolbox) that perform quantile r...

6 Tage ago | 0

| accepted

Answered
while loops not work using randsample
The specific reason is that you never enter the first while loop, because the condition eq1<1 && eq2>1 is never true. I didn't...

6 Tage ago | 0

| accepted

Answered
Is there an equivalent to the '+=' operator in MATLAB?
No, MATLAB does not have that syntax. There is some prior discussion of this issue in this question.

6 Tage ago | 1

| accepted

Answered
Index in position 1 is invalid. Array indices must be positive integers or logical values.
>> format long >> index index = 1.729000100000000e+03 index is not equal to 1729.

7 Tage ago | 0

Answered
Remove a row from an array
I don't quite understand. Do you mean that if a row from grid also appears as a row in yx, then that row should be removed from...

7 Tage ago | 0

| accepted

Answered
Adding Matrices to make Bigger Matrix
Here is a straightforward way to do it with a for loop: A{1} = [ 1 -1; -1 1]; A{2} = [ 2 -2; -2 2]; ...

7 Tage ago | 0

| accepted

Answered
Compare two tables and extract the columns similar to both
If I understand correctly, then C = B(:,ismember(B(1,:),A)) does what you want. From your example, it looks like A is a row v...

7 Tage ago | 0

| accepted

Answered
I have a question about gathering same numbers together in a matrix
If M is your matrix, then M_sorted = sortrows(M,3) will output M sorted by the 3rd column, maintaining the order of the other ...

8 Tage ago | 0

Answered
Compare two matrix row by row and check if at least one row is different, enter the if loop
The expression all(ismember(A,B,'row')) will be true if every row of A is represented in B, and false if not.

9 Tage ago | 1

Answered
Generation of rundon numbers with different scales
You aren't very specific, but the following will generate random values scaled by the value in M. r = 0.1*M.*randn(size(M))

9 Tage ago | 0

Answered
Why is Matlab PCA calculation different from results from R and Orange3?
Here's my guess: The difference between R and MATLAB is that in R, you scaled the data, in addition to centering them -- each c...

9 Tage ago | 1

Answered
Char to cell array of strings
output = regexp(c,'BL[\d.]*','match'); where c is your input character array. That will actually give a cell array of characte...

10 Tage ago | 0

| accepted

Answered
Unmatched parameter name error when connecting to a PostgreSQL database
Sorry for the delayed reply, and I truly don't know if this will help or not. It does not seem to directly related to your error...

10 Tage ago | 0

Answered
data labels in plot- in code
Use the legend command.

11 Tage ago | 0

| accepted

Answered
Change size 3D matrix
I think what you want is to use permute(EP(f,:,:),[2 3 1]) as the input, instead of just EP(f,:,:), so that you have a 2-d mat...

12 Tage ago | 0

Answered
Assigning a special character to a value
You can use the isvarname function to determine if something is a valid MATLAB variable name. The naming rules are here. (I sup...

12 Tage ago | 0

Answered
Issue with vectors?
Sorry to be snarky, but did you trying reading the error message? It tells you what to do right there. x = 0:.05:1; y = exp(-...

12 Tage ago | 0

Answered
When using listdlg, what is the value assigned when the user exits without making a selection?
Quoting the documentation for listdlg ... "If the user clicks Cancel, presses Esc, or clicks the close button in the dialog box...

12 Tage ago | 0

| accepted

Answered
Unmatched parameter name error when connecting to a PostgreSQL database
I am not able to test this right now, but it seems possible to me that MATLAB wants single quotes instead of double quotes aroun...

12 Tage ago | 0

Load more