Community Profile

# the cyclist

### Alden Scientific

Last seen: Today Actif depuis 2011

Head of Modeling and Statistics at Alden Scientific. 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.)

Programming Languages:
Python, R, MATLAB, SQL
Spoken Languages:
English

All

#### Content Feed

Afficher par

A répondu
i don't know why the legend doesn't take the same type of line that simulated , for example if dashed line used , so the legend should be dashed also ?
The problem is what @Voss described. Here, I've removed your legend completely. When you use the plot() function with a cfit obj...

environ 13 heures il y a | 0

A répondu
Create a figure with the same x-axis on top and bottom, and y-axis on the left and right.
Based on your comment on my other solution, here is a different guess as to what you mean. (I'm still not really sure.) This co...

environ 13 heures il y a | 0

A répondu
Create a figure with the same x-axis on top and bottom, and y-axis on the left and right.
I am not entirely sure I understand everything you want. But, borrowing from this answer, here is code that will label ticks on ...

environ 16 heures il y a | 0

A répondu
Type of t-statistic returned by mnrfit for an ordinal model?
The t-statistic does not have "tailedness". It is a ratio of the effect coefficient to the standard error. One might use the t-...

environ 20 heures il y a | 1

A répondu
Do "pointers" exist in MATLAB? A question about the efficiency of using shorthands.
In general, MATLAB will not allocate new memory until it needs to, and will just use the same "array reference" to memory. See H...

environ 23 heures il y a | 0

| A accepté

A répondu
How can I create a matrix that contains number and text without using the cell array?
The MATLAB table data type is probably the best for this. Then, how you choose to export the data from MATLAB will also be impo...

1 jour il y a | 0

A répondu
How do I create a table and add a row of text from an existing matrix?
% Pull the data as a table (even though we are only going to use it to get the header row) tbl = readtable("TestFile.xlsx"); ...

1 jour il y a | 0

A répondu
searching for the particular point value from the two different data sets
Without more detail about how your dataset is structured (e.g. do you have two vectors, or arrays, or tables?), it is not possib...

3 jours il y a | 0

A répondu
Randsample with matrix: extract multiple values from every column of a matrix without loop!
Here is a pretty obfuscated one-liner, but I think it does what you want, and should be fast: % Your data z_k = 2; pV= [0.552...

3 jours il y a | 0

| A accepté

A répondu
use array operations to add 360 to elements of an array less than -180 without a loop
A = [1,2,3,359,5,358,355]; idx = (A>=180); A(idx) = A(idx) - 360

4 jours il y a | 1

| A accepté

A répondu
How to locate X value for a given Y value
It would be helpful if you uploaded the data. You can use the paper clip icon in the INSERT section of the toolbar. It seems li...

4 jours il y a | 0

A répondu
How to compare classifiers on different datasets?
I don't know that there is one best answer to this. I think that a useful way to think about it is to realize that what you rea...

4 jours il y a | 0

A répondu
Unrecognized function or variable 'Newton_Starbucks'.
I searched the internet for "Newton_Starbucks". The only link I found was this one. If that's relevant, then it seems to me that...

4 jours il y a | 0

| A accepté

A répondu
How to break data in to groups using while loop?
Here is one way: matrix = [1 50 60 70 50 40 2 NaN 10 20 10 10 3 NaN 20 NaN NaN NaN 1 NaN 60 30 40 50 2 10 2...

5 jours il y a | 1

A répondu
How to label the numeric values at the end of a stack in a stacked bar graph?
More of an editorial comment than just adding to the solid solutions that are already here, but I think a more economical (and m...

5 jours il y a | 1

A répondu
help me to find error in this file?
The error seems to be that you are missing parentheses, or they are otherwise mismatched. We could guess at where they are missi...

6 jours il y a | 0

| A accepté

A répondu
Use data array with specific names
You are seeing first-hand why variables should not be named dynamically. If at all possible, this problem should be solved upstr...

7 jours il y a | 0

A répondu
Finding the first index of a row where all integers of a defined list have occurred
I 100% agree with @John D'Errico's take on this, which is that any non-loop solution here is (probably) going to be sufficiently...

9 jours il y a | 0

A répondu
How can I plot this X and Y data?
It's unclear to me exactly what you want to plot. That file has 10,048 data points. Here is one possibility, which puts a dot a...

9 jours il y a | 1

A répondu
Way to solve AX=XB
This is a special case of the Sylvester equation. Looks like the sylvester function will be helpful for you. You might also be...

11 jours il y a | 0

A répondu
linear mixed-effects model (fitlme) add array variable
I am by no means an expert on image processing, but one possibility is to preprocess your images to extract individual "features...

11 jours il y a | 0

A répondu
post hoc tests for aoctool
After running aoctool and getting the stats output, you can simply run [results,~,~,gnames] = multcompare(stats) If you do tha...

12 jours il y a | 1

| A accepté

A répondu
Mat structure to csv
I downloaded the first file on that page, which is EXIOBASE_3rx_aggLandUseExtensions_1995_pxp.mat, and then uploaded it to MATLA...

12 jours il y a | 0

| A accepté

A répondu
Randomly select one value from an Array.
Here is one way to pull 30 random values (with possible repeats) from A. randomIndex = randi(200,30,1); new_A = A(randomIndex)...

12 jours il y a | 0

A répondu
Unable to perform assignment because the size of the left side is 1-by-1 and the size of the right side is 1-by-120.
You haven't quite given us enough information about your code, because that little code snippet may or may not work, depending o...

12 jours il y a | 0

A répondu
0.48 and 0.72 not detected in the array
Due to floating point precision, the values are not exactly 0.48. For example, load("varmat.mat","SessionData") SessionData.Co...

13 jours il y a | 1

A répondu
What are the differences between integral and trapz?
Both functions perform numerical integration, but they use different methods. This is mentioned within the first couple of the d...

14 jours il y a | 2

A répondu
how to split a dataset for training and testing in matlab?
randsample, cvpartition, and randperm can all be useful for creating training/test splits. As @Sargondjani mentions, we need mor...

14 jours il y a | 0

| A accepté

A répondu
run takes too long!
Vectorizing the for loop gives a nice speedup. There are almost certainly other optimizations possible. clc clear; % percent ...

15 jours il y a | 1

A répondu
How to quantify the goodness of a fit?
EDIT: My first posting on this was incomplete, so I radically edited it. Sorry for any confusion if you saw the first version. ...

16 jours il y a | 0

| A accepté