# Dave B

### MathWorks

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

**Statistics**

RANK**90**

of 258.326

REPUTATION**1.416**

CONTRIBUTIONS

**0** Questions

**440** Answers

ANSWER ACCEPTANCE **
0.00%
**

VOTES RECEIVED**136**

RANK**11.272** of 17.802

REPUTATION**31**

AVERAGE RATING**4.00**

CONTRIBUTIONS**2** Files

DOWNLOADS **18**

ALL TIME DOWNLOADS**158**

RANK

of 110.429

CONTRIBUTIONS

**0** Problems

**0** Solutions

SCORE**0**

NUMBER OF BADGES**0**

CONTRIBUTIONS**0 Posts**

CONTRIBUTIONS**0** Public Channels

AVERAGE RATING

CONTRIBUTIONS**0** Highlights

AVERAGE NO. OF LIKES

**Content Feed**

loop with subplot in MATLAB

The first loop creates a figure for each cell, but the next too loops don't. Did you want a figure for each cell? acceleration=...

15 giorni ago | 0

| accepted

Plotting a graph with different colors depending on different vectors

You can plot multiple vectors by either: passing them into plot as a matrix, plot will make a line for each column of the matri...

circa 2 mesi ago | 0

Geographical maps in Matlab

How about something like this? paris = [48.5 2.2 46]; london = [51.5 0.1 48]; newyork = [40.7 -74 54]; natick = [42.3 -71.3...

circa 2 mesi ago | 0

UI doesn't show buttongroups but doesn't give any error

The problem you're running into is just the order in which you set Units and Position: bg(i).bg = uibuttongroup(fig,'Title',['S...

circa 2 mesi ago | 1

error in the code

It looks like you're passing in a matrix, but I think you want to pass in a vector. Try transposing t? t=linspace(0,2,16000)'...

circa 2 mesi ago | 0

Converting text to datetime stamp in Data Table

It's a little difficult to understand exactly what's in TMX2DataFile3TCs25through48 from the code, I think the dates you pasted ...

circa 2 mesi ago | 0

I want to have specific values on y-axis of the plot.

To set the y tick values, you can use the YTick property on the Axes. You can use gca and set to apply these to the current axes...

circa 2 mesi ago | 1

need help for adding a error bar

I think the problem you ran into was that you were calling errorbar with 4x4 matrices for x and y, and 1x12 vectors for yneg and...

circa 2 mesi ago | 0

| accepted

Combining two surfaces from two files into one surface plot

Do you mean two different .fig files? You can generally find objects that live in an axes with findobj, which is good for look...

circa 2 mesi ago | 0

| accepted

Data overlapping when plotting stacked bar graphs

The data aren't overlapping, you're simply seeing the effect of a log scale, which is a little strange for a stacked bar. The va...

circa 2 mesi ago | 0

Aligning axes labels in 3D plots

The differrence between your labels and the axes is because MATLAB stretches an axes to fill the space of its container - if you...

circa 2 mesi ago | 2

| accepted

how to display/table numbers and letters

I think this is what you're trying to produce? z=[1;2;3;4;5;6]; Gz = nan(size(z)); Gz(z<4) = log(10./(4-z(z<4))); Gz(z==4)...

circa 2 mesi ago | 0

how to copy a figure with a figure inside it using Matlab?

I think you just copied the small axes into the same position, making them into big axes (and putting them on top). In other wor...

circa 2 mesi ago | 0

| accepted

How to plot z component as a colorbar with lines connecting scatter plot points?

I think what you're asking for is a color gradient on the line? Unfortunately lines don't have color gradients. A common workaro...

circa 2 mesi ago | 0

| accepted

change color for specifics bars

I didn't fully understand your explanation of which colors you want where, but really all you have to do is set CData as you lik...

2 mesi ago | 0

| accepted

plot of y = 2.*(x.^4 - x.^2) isn't right

I'm pretty sure that's correct, were you expecting to see more of a w-like shape? You might have to zoom in a bit for that (and ...

2 mesi ago | 2

Separate y & x axis

There are some submissions on file exchange for this, like this one: https://www.mathworks.com/matlabcentral/fileexchange/57366-...

2 mesi ago | 0

Colours of a Histogram

If you're specifying the counts, could you use bar instead of histogram? bar has a CData property for this purpose. The limits w...

2 mesi ago | 0

| accepted

Opening multiple figures from directory and extracting X and Y data simultaneously

@Daynah Rodriguez: The problem that jumps out in this code is: ii = find(0.7 < y < 1.0,1); This makes sense mathematicall...

2 mesi ago | 0

| accepted

How do I use tiledlayout when each plot is made within a subroutine?

You're seeing the error because when tiledlayout is in charge of positioning axes, it doesn't let you do it. It looks to me lik...

2 mesi ago | 1

95% uncertainty bounds

If you have 100 simulations per day, and you want to use your simulations to estimate 2.5% to 97.5% around the median (a 95% con...

2 mesi ago | 0

Plotting grouped box plot of varying lengths

First of all, if you use boxchart (released in R2020a) you'll have a bit more flexibility than the old boxplot function. The ...

2 mesi ago | 0

Stackedplot axes XLabel = ('Raman shift [cm^{-1}]') (superscript) not working

Unfortunately stackedplot doesn't let you control the interpreter for the XLabel, so you can't use tex like you can for a regula...

2 mesi ago | 1

| accepted

how to separate a matrix into 2 vectors

You can do this pretty easily with some indexing. Here's an example with some random data: m = [rand(10,2) randi(2,10,1)-1] ...

2 mesi ago | 0

| accepted

Replotting a 2D graph on a 3D surface keeps all 3 axes

cla doesn't reset the view. Here are some options: Set the view explicitly: view(app.UIAxes, 2) Call cla with the reset fl...

2 mesi ago | 1

| accepted

Change stackedplot YLabel?

The DisplayLabels property gives you access to the y labels: sp=stackedplot(rand(10,4)); set(sp, 'DisplayLabels',["Apples" "Or...

3 mesi ago | 0

| accepted

Loop-free histogramming of each column of an input matrix

This is somewhere between workaround and hack, but you could do it with histcounts2: X=rand(5); a=histcounts2(X,ones(5).*(1:5)...

3 mesi ago | 0

| accepted

Label 0 in a semilog plot

You can fake the tick labels, but setting the TickLabels property, but another way to do this is to use 2 axes. I like doing thi...

3 mesi ago | 1

| accepted

I can't read UIAxis Exponent value

This actually isn't quite the bug you've identified, although I'm surprised by the behavior: The (automatically calculated, not...

3 mesi ago | 1

| accepted

MATLAB Programming Techniques Course quiz problem

You've marked the second and third lines as being 8e4 and 8e5 bytes, but this is incorrect. Hint: how many elements are in a ...

4 mesi ago | 0

| accepted