Cris LaPierre

MathWorks

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How can I plot lat lon and z-data with changing colors?
A couple of the mapping plotting functions come to mind. Your Z value is used to determine the color. plot3m scatterm geoplot...

13 hours ago | 0

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How can I assess Symbolic Units and use assessVariableEqual to admit tolerances in MATLAB Grader simultaneously ?
I believe this answer is related: https://www.mathworks.com/matlabcentral/answers/512436-grader-says-answer-verified-in-referen...

16 hours ago | 0

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How to delete content of table data from gui ?
All the data returns because you likely have not cleared your variable p.MyData. You code for collecting values appends the new ...

3 days ago | 0

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Index exceeds the number of array elements. Index must not exceed 1.
See the full error message: Index exceeds the number of array elements. Index must not exceed 1. Error in LE_RF_p1 (line 4) X...

3 days ago | 0

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How to plot 3D vectors on a 2D plot?
The solution likely varies depending on your data, but I would probably first look into using imagesc: imagesc(x,y,C) This way...

4 days ago | 1

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Appdesigner 'Value' must be double scalar
The Value property can only be a single numeric value (that's what is meant by 'double scalar'). It is likely the result of csvr...

4 days ago | 0

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Edit field numeric appdesigner
I would use the Label component to add the '*X' to the right of the edit field.

5 days ago | 0

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What's the difference?
In b), you rerun the code you developed for a) for each student in your list. Typically this would be done by placing the code f...

5 days ago | 0

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How to fix unallignment of box plot in subplot when using sgtitle?
Interestingly, if I run your code in a live script, it initially renders incorrectly, but then corrects itself. If I run your co...

8 days ago | 1

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Answered
How to recover .m file lost due to the abnormal termination
See this page: https://www.mathworks.com/help/matlab/matlab_env/recovering-data-after-an-abnormal-termination.html

8 days ago | 0

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Can "datetime" be responsible for the misalignment of data in a plot ?
I think the allignment difference is due to what MATLAB is setting your axis limits to when the x values are datetimes (Jun 17 -...

10 days ago | 1

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Live script, convert to local function
It is bad practice - and completely unnecessary - to create a function where the first command is clear. Remove this line of cod...

11 days ago | 0

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Chirp plot is not drawing
You need to place hold on before you add a second plot to your axes. Your code currently replaces the plot with the stem plot. ...

11 days ago | 0

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How do I get MATLAB to read a long number as a date and time?
Convert your numbers to strings, and then use datetime to convert it to a time. % original data t = [11142021092415; 724202009...

11 days ago | 0

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Combine two matrices according to datetime in first column
You are going to have a challenge here because the tolerance indicated in your example (~1 minute) is much larger than the small...

11 days ago | 0

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Get datenum to return missing instead of throwing an error
I would start by looking into the standardizemissing function.

17 days ago | 0

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Input mesh does not form a closed volume error; checked that mesh is watertight
I wouldn't say I can suggest a more elegant workflow, but here is one that I have found to work in the past. It involves using s...

18 days ago | 0

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MATLAB Online does not run script properly
Code runs without error for me. I can also run it here without error. Perhaps try again? If it happens again, perhaps there are ...

19 days ago | 0

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How do i delete a repeating row
Modified from this example [C,ia] = unique(grades{:, 1}); B = grades(ia,:) See this page for alternate ways to access data in...

21 days ago | 0

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Plotting data from text file , subplot
See the examples in the following documentation pages readmatrix subplot plot

23 days ago | 0

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Help with code, writematrix not working. Please help fix
Your first input to writematrix needs to be a variable name, not a char. Change this: writematrix('Departure City:','table1.xl...

23 days ago | 0

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Operands to the || and && operators must be convertible to logical scalar values.
Use || and && when you are comparing a single (scalar) value. Use | and & when you are comparing arrays (when there is more than...

23 days ago | 0

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Passing Data between two Apps
See this support page https://www.mathworks.com/help/matlab/creating_guis/creating-multiwindow-apps-in-app-designer.html and t...

23 days ago | 0

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how can I open a matlab app that I designed in AppDesigner inside another app that I'm creating (always in AppDesigner)?
See the Create Multiwindow Apps in App Designer page

24 days ago | 1

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How to conditionally and by groups subtract one row from another in table?
I think I would calculate the results to a new table using groupsummary, then concatenate the tables. This is a little longer th...

24 days ago | 1

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Extract data from sequentially named tables
Converting your tables to stuct or cells to me seems like taking a step backward. Why not just concatenate all the tables togeth...

25 days ago | 1

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How to automatically get the axis of a figure in Live Editor?
You can get the axes object in a figure the same way you would outside of a live script. Option 1: capture the axes object by c...

26 days ago | 0

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I keep receiving an error when I try to run this code for a 3DOF mass-spring system "Index in position 1 exceeds array bounds. Index must not exceed 1".I am confused as to why
The problem is that zeta is a scalar, not a vector. The fix is to not index this variable. n=3; %degree of freedom m1= 45400; ...

27 days ago | 0

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Can matlab grader questions be vulnerable by hackers through pretest?
If the pretest assessment is a MATLAB Code test type, then learners can expand the test to see the underlying assessment test co...

28 days ago | 0

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Create a GUI interface in MATLAB for simple image functions like reading and displaying??
Take a look at this example app.

29 days ago | 1

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