David K

Last seen: 4 days ago | Active since 2015

I spend a lot of time in MATLAB, with my focus on signal processing and data analysis.

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Question

How to determine if an axes already has a colorbar?
I would like to determine if an axes already has a colorbar. I have code which plots many objects on the same axes, but I only w...

1 month ago | 1 answer | 0

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answer

Question

Creating a scatter plot with patch
I am working with code created by someone else long ago that performs a lot of complex custom plotting tasks. I also have my own...

2 months ago | 1 answer | 0

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Scroll to location within uidropdown
I have a uidropdown with a very long list of options. I would like to set it so that when a user clicks on the dropdown it autom...

11 months ago | 1 answer | 0

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answer

Question

How do I extract custom data tip info
I have created custom data tips for my plot using the DataTipTemplate functionality. When I add cursors to a plot they display n...

1 year ago | 1 answer | 0

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Very slow adding datatips to datetime plots
I have a custom plotting tool that allows me to plot my data in many different formats. I've found that when my time variables a...

1 year ago | 1 answer | 0

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Extreme delays when creating parpool in newer releases
I am trying to do some parallel processing and have run into issues when creating the worker pool. When I run the parpool comman...

1 year ago | 0 answers | 0

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NaN value in data tip causes error
I am using dataTipTextRow to create custom data tips for my plot. I have found that when there is a NaN value in the Value field...

2 years ago | 0 answers | 0

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Unable to change default radio button in button group
I am building an app in appdesigner which contains a Radio Button Group. I recently decided to add a new radio button option to ...

2 years ago | 1 answer | 0

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Question

Parfor converting object to double?
I am trying to parallelize some of my code to make it run quicker and ran into a weird error that I get in 2019a but not in 2020...

3 years ago | 1 answer | 0

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Question

How to parallelize when loading lots of data
I have been struggling to speed up my MATLAB code which loads a number of large data files into custom class objects. My two cla...

3 years ago | 1 answer | 0

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Question

Major slowdown when clearing objects in the wrong order
I've built a set of custom classes that I use for accessing and analyzing our datasets. I've run into the problem that when I ru...

3 years ago | 0 answers | 0

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How to disable title of ButtonGroup
I have an app I've created using App Designer. Included is a Button Group that I would like to Enable and Disable with a checkbo...

3 years ago | 1 answer | 0

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Question

Can I use arrows to move Data Tips on scatter plots?
I know that when using the plot function with data tips you can use the arrow keys to move the data tip through the data set. Is...

3 years ago | 2 answers | 0

2

answers

Question

Path not searching in current directory first
On my path I have a folder called "Other_Code" which contains "@myClass/myClass.m". In the directory I am running from I have a ...

3 years ago | 0 answers | 0

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Question

Any way to make a global wrapper code for all callbacks in App Designer?
I am in the process of migrating a GUI I created using GUIDE to App Designer (2019b). In GUIDE, I added code to the main functio...

4 years ago | 0 answers | 0

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Add value limits to cells in uitable
I am creating a GUI using the App Designer (2019b). One of the nice features for NumericEditField is that you can define value l...

4 years ago | 0 answers | 1

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Question

Format ToolTip strings in AppDesigner
I am working on migrating a GUI from GUIDE to AppDesigner. In GUIDE, I could format the tooltip text by supplying an HTML string...

4 years ago | 2 answers | 0

2

answers

Question

Read text file with multiple rows of fields
I am trying to read in a large text file with a challenging formatting. Instead of one long row of many fields, the file is brok...

4 years ago | 1 answer | 0

1

answer

Question

"Error during serialization" when modifying plot created from custom classes
I have been running into the following error in a couple of different situations: Error using scribeccp. (Line 24) Error durin...

4 years ago | 0 answers | 0

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answers

Question

Error when trying to remove object from plot
I have an axis containing multiple plotted objects, created both from the `scatter` and `plot` commands. If I want to remove one...

5 years ago | 0 answers | 0

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Question

How to handle empty strings with datenum
I have a comma-separated text file I am reading in and parsing using |textscan|. Two of the fields are the date and time of day....

6 years ago | 1 answer | 0

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Question

Is it possible to determine when I last used a toolbox?
It's coming time for me to renew my license, and I have a couple toolboxes that I rarely use, if at all. Is there a way to see w...

7 years ago | 3 answers | 0

3

answers

Question

Which functions require double precision
I recently got the following error: The input signal X must be a double-precision vector. Now, I understand the error an...

7 years ago | 1 answer | 0

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Question

Can I put a try-catch in GUI initialization code?
I am building a GUI using GUIDE in 2016a which I will be compiling and deploying. I want to try to do some global error handling...

7 years ago | 1 answer | 0

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Question

Force return from function while debugging
I am debugging a program and would like to return from a subfunction without completing the function. For example, you can write...

7 years ago | 1 answer | 0

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Question

Use individual license on a network
I have an individual license, which allows me to install and use MATLAB for one user on up to four different machines. One of th...

8 years ago | 1 answer | 0

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Question

Why does Matlab use 'log' instead of 'ln'?
Okay, I understand that the function for natural logarithm is "log()" and the function for base 10 logarithm is "log10". However...

8 years ago | 3 answers | 0

3

answers

Question

Use Parallel Toolbox to debug multiple scripts
I have two different scripts that I would like to debug simultaneously so I can compare their behavior. Is there a way I can use...

8 years ago | 1 answer | 0

1

answer

Question

Why is errorbar whisker length dependent on X?
I am running a simulation in Matlab 2015 which creates data each round, so I am plotting a number of single errorbar series indi...

9 years ago | 2 answers | 0

2

answers

David K

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