# Dave B

### MathWorks

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

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**Content Feed**

How to plot three subplots on the same axis?

There are a few options better than subplot. The easiest thing (as @Mathieu NOE mentions in the comments) is to use stackedplo...

4 hours ago | 1

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Is it possible to colour a scatter3 according to its mean and maximum value

You can color the points in a scatter3 by passing in a vector specifying the value you'd like to map onto color as the 5th argum...

17 hours ago | 0

Trying to retrieve and display the initial value of an input

I think you just flipped it, if you want to set a equal to the initial value of x0, do a=x0 demo(5,10) function demo(x0,x...

18 hours ago | 1

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How can I graph an average and individual participant data?

It's a little difficult to visualize what this looks like, but here's what i took away from looking at your code you have a thi...

11 days ago | 0

scatter not ploting matrix

Yes this functionality was just recently introduced in R2021a The relevant section from the release notes reads: Scatter Plo...

12 days ago | 0

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Why do I receive "Index exceeds the number of array elements (1)" ?

You wrote: For some background, m and t are both defined already in my workplace and they are both vectors. But you redefine...

12 days ago | 0

Drawing a line to divide two parts of a curve

You can draw a vertical line very easily with xline area works well for filling a part of the curve x=linspace(-3,3,100); y...

12 days ago | 0

51 uniformly-distributed points

You can create uniformly (linearly) distributed values with the linspace function: x = linspace(0, 5, 51) Alternatively, you m...

12 days ago | 0

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array indexing returns empty row vector while attempting to locate index corresponding to only certain array values

This is an issue of floating point arithmetic, another way to state the problem is: (.1+.2)==.3 What? How can those not be equ...

13 days ago | 0

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Dealing with Data Structures

I think in general it's better if your struct is an array rather than using names of fields in the struct as an array, but if yo...

13 days ago | 0

Nested for loop for multipication

I think the question is really how you store your total values (you didn't store them in your snippet, so I'm not sure how you p...

13 days ago | 0

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fill missing point in data (x y z 3 columns data)

You can use meshgrid to make x and y grids, and then ismember with the rows flag to find which pairs of x and y are missing: % ...

14 days ago | 0

How to locate the plotting title above the legend, where the legend is placed "northoutside"?

You can put a title on the legend, but I think you just want a master title for everything. You can do that by placing your axes...

14 days ago | 2

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How to relate data to other data from excel in MatLab?

In general, it's better to think of it not as Height(Name1), but as Height(Species=="Name 1"), this extends to all sorts of data...

14 days ago | 0

How do I use output values from a function to plot those values in a script

I think what you're looking for is: [t,~,v] = rocket_euler(30,20) plot(t, v, '.-','color',[0 1 0],'Marker','x','markersize',15...

14 days ago | 0

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select one item between two List Box

How about just using the callback of one to deselect the other: % Set up some example listboxes: u = uifigure; lsta = uilistb...

14 days ago | 0

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graph with two formulas

You can make the error bars with the errorbar function, but your excel file doesn't appear to include data about error... a=r...

14 days ago | 1

Call Function from .m file in command

@L McKeehan - perhaps the most common reason for this is that the function is not on MATLAB's search path. When you try to run a...

15 days ago | 0

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What should be the distance between the two cameras?

This isn't a very MATLAB-y answer, but the lenses in stereo cameras typically try to replicate the distance between the eyes (ac...

15 days ago | 0

Trying to change columns in a Matrix

Specifying rows and columns makes MATLAB point to rectangles: a(1:2,1:4) refers to rows 1 and 2, columns 1 through 4, i.e. MATLA...

15 days ago | 1

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Showing the equation of the best fit lines per graph

Are you struggling with how to get the text? or how to display it on the chart? Here I put them in the legend, and also added...

15 days ago | 0

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Get ticks to lay across colorbar

The unit for TickLength is peculiar. If you check out how it's documented on the colorbar page it says: Tick mark length, speci...

15 days ago | 0

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Index of value when you want to check multiple elements at the same time between 2 cell arrays

If I understand the quesiton, you want to find indices in A where the values in B are found when they are in A. You can use ...

15 days ago | 0

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How can I generate random varaible from 0 to 1 without including 0?

The rand function generates randum numbers between 0 and 1, not including 0 or 1: https://www.mathworks.com/help/matlab/ref/ran...

15 days ago | 0

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Can I Use the matlab in the mobile phone or tablet rather than laptop?

Yes there's information about MATLAB mobile here: https://www.mathworks.com/products/matlab-mobile.html It's pretty difficult t...

15 days ago | 0

semilogy, loglog do not work in order to set the y axis on a logarithmic scale

When you use the log plotting functions they don't change the axis scale if hold is on. There's a note all the way at the bottom...

15 days ago | 1

How to plot a matrix containing NaN?

pcolor specifies color at the vertex, which (confusingly) means that you have one less row and column. It does great with NaN th...

15 days ago | 1

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How do I combine my function's output matrices into a single matrix?

Your function loops over some values and for each one computes a row vector. To store the row vector in a matrix, specify an i...

15 days ago | 0

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How to compute a vector

Here's how I'd break this down. First, let's have a look at what the syntax produced for X: X=[1,2,3;4,5,6] So X is a matrix...

16 days ago | 1

Stacked plot /waterfall plots to visulaise figures

If you want to put these data into a waterfall, you can do waterfall(e') but that won't get your time axis correct. Using meshgr...

17 days ago | 0

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