Community Profile

photo

Dave B

MathWorks

Last seen: Today Active since 2020

I am a software engineer at MathWorks. My work focuses on graphics and charting.

Statistics

All
  • 3 Month Streak
  • Pro
  • Knowledgeable Level 4
  • Revival Level 2
  • Personal Best Downloads Level 1
  • 5-Star Galaxy Level 1
  • GitHub Submissions Level 2
  • First Submission
  • First Answer

View badges

Content Feed

View by

Answered
How to play a note
The Note you made is a logical: you're asking where abs(t) is less than or equal to (a bunch of stuff) If you want to play th...

environ 9 heures ago | 0

Answered
How can I obtain a certain value from the function 'find' from a 3x2 cell?
I think you're asking how to search for the index of a row in a matrix based on multiple columns (although you have a cell array...

environ 10 heures ago | 0

Answered
prevent shaded areas from changing the colors of the bars.
First, you'll want the patch behind the bars, so call patch first. You can keep the transparency on the patch, but if you don't...

environ 12 heures ago | 0

Answered
Convert Cell Array into equation
I think you could use a combination of cellfun (to run on each cell) and eval (to evaluate the expression): a=readtable('matl...

environ 13 heures ago | 1

Answered
Error: This statement is incomplete.
MATLAB won't distribute your j to all the locations in your print string, so you need a few more js. Have a look without the eva...

environ 13 heures ago | 0

| accepted

Answered
programme matlab pour calculer et trace l'histogramme d'une image
im=imread('peppers.png'); % exemple d'image imshow(im) Si vous avez Image Processing Toolbox: figure imhist(im) Autrement...

environ 23 heures ago | 0

Answered
A question about ismember function
Check out the documentation page here: https://www.mathworks.com/help/matlab/math/array-indexing.html (Indexing with Logical Val...

1 jour ago | 0

| accepted

Answered
My mesh grid is giving me a value not a matrix
The question is: how many points do you want in your grid? The : operator, by itself, takes increments of 1: 5:10 The min a...

1 jour ago | 0

Answered
Discrepancy between datenum and datetime?
This is one of the many reasons we have datetime, and why we recommend using datetime instead of datenum. If you can use datetim...

1 jour ago | 0

Answered
xlabel not working inside a function
You've named the function's parameters xlabel and ylabel. So within the function xlabel and ylabel are variables, not functions....

1 jour ago | 0

| accepted

Answered
Connect datapoints in Plot
Unfortunately, not all plotting functions accept table variables in MATLAB yet (scatter was one of the first of the 'traditional...

2 jours ago | 0

| accepted

Answered
drawrectangle draws rectangle even though the mouse is clicked outside the parent UIAxes
You can pass in a DrawingArea to drawrectangle which will constrain the rectangle to the image. That keeps the drawn rectangles ...

3 jours ago | 0

Answered
Combining Graphs into one Figure
The command figure makes a new figure, so just remove the second call to figure and you should be in good shape! %% Part 1 ...

3 jours ago | 0

Answered
What is the exact reason of this error? I am not getting it. Any help will be appreciated.
As @Mathieu NOE points out, there's something a little strange in your col_headers = line. This line has a bunch of extra charac...

4 jours ago | 0

Answered
Merging three 3D plots into one
You can copy the surfaces from each of the axes, in each of the figures that you open like this: a=open('BandL_my_replication_v...

4 jours ago | 0

| accepted

Answered
Issues with greyscale png images in matlab
This looks like the result of loading an indexed image, you can read the colormap using the second output of imread: [img,cmap]...

4 jours ago | 0

| accepted

Answered
My line plot is not showing
Did you want to plot 1:Ns vs p (without the i)? plot(1:Ns,p)

4 jours ago | 0

| accepted

Answered
How to combine multiple images into an array
You can convert a 'greyscale' RGB image to a 2D image in a few ways. For instance: you could just take one channel (like the red...

4 jours ago | 0

| accepted

Answered
Multiple 3D trajectories displayed on same axis
There's a typo in your code: x1_2 = rmmissing(x1); y1_2 = rmmissing(y1); z1_2 = rmmissing(z1); x2_2 = rmmissing(x1); y2_2 =...

4 jours ago | 0

| accepted

Answered
Incomplete Normal Distribution Plot on MATLAB
The function normpdf(x,mu,sigma) will return the pdf of the normal distribution with mean mu and standard deviation sigma, evalu...

4 jours ago | 0

Answered
How can I calculate log10(variable) ??? there is error..
Assuming you've defined your variable and it's numeric, this should work: variable=100; log10(variable) x=[100 200 500 1000];...

4 jours ago | 0

| accepted

Answered
Convert Python time to Matlab datum
Python has several ways it represents time. A common one is so called unix timestamps, which are the number of seconds since 197...

7 jours ago | 1

| accepted

Answered
error when using datetime()
Does it work if you add str2double? like this: S.date = datetime(S.Year, S.Month, str2double(S.Day), 0, 0, 0, 'Format', 'uuuuMM...

7 jours ago | 0

| accepted

Answered
How can I build a matrix with an increasing number of terms in each row?
You can't have a matrix with a different number of elements on each row, but if you wanted the sums 1, 1+2, 1+2+3,... (as you de...

7 jours ago | 0

| accepted

Answered
Call fields from a struct
I'm a little confused, but I'll venture some guesses.... Do you have a struct init in your workspace (where you're calling th...

7 jours ago | 0

Answered
surf command doesn't plot the value next to NaNs values
If you think of surf as defining a bunch of little rectangles, when one vertex is missing you can't draw the rectangle. Your d...

7 jours ago | 1

| accepted

Answered
Printing cell array with skipping a value
If you want to get rid of just the one value, how about setting it to empty inside of matComp. Note that you'll end up with one ...

8 jours ago | 0

| accepted

Answered
tiledlayout not forming figures as intended
Just pasting my comment in the answer in case it may help someone else, it struck me as strange that there was a hold on before ...

8 jours ago | 0

Answered
Specifying a sample of data from a table
This sounds like a pretty broad topic, how to index things in MATLAB. You might be interested in this documentation page abou...

8 jours ago | 0

Answered
How to save a figure of a specific size with exportgraphics
you created a tiledlayout in one figure, set some of its characteristics but didn't add anything to it. Then you created a new f...

8 jours ago | 0

| accepted

Load more