# Cris LaPierre

### MathWorks

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**Content Feed**

Can be served in a virtual environment MatLab?

You should contact your university's MathWorks representative or Contact Sales directly.

etwa 10 Stunden ago | 0

I get a Warning from scatteredInterpolant.

It means it discovered duplicate (x,y) pairs. See the Eliminate Duplicate Sample Points section of the documentation page for m...

etwa 10 Stunden ago | 0

Writetable for different data to same file

See the Append Data to Bottom of Table example on the writetable documentation page.

etwa 10 Stunden ago | 0

Help reorganizing data in a table

I like Konrad's approach. You can easily reorder the results to be what you want, and it's easy to understand. I went down a rab...

etwa 14 Stunden ago | 0

| accepted

How do you plot the solution of a system of odes against a parameter of the function and not time?

In your code, delta and m are constants. It is likely they ran multiple simulations to create that figure, varying the contants ...

etwa 15 Stunden ago | 1

| accepted

Recognise micrometer symbol in image

I have only played around with this quickly, but it is likely part of the issue is that you are using the english language packa...

3 Tage ago | 1

| accepted

Filtering down a readtable based on specific value in a column

Assuming we are missing some of the code (all the column numbers used to construct RawBonusStars, I believe your issue with the ...

5 Tage ago | 0

Unable to use a value of type string as an index

Correct. An index must be a positive integer value. If you instead intended to pass in a variable containing the index values, r...

6 Tage ago | 0

subtract each element from the one before in a row matrix

You are overwritting your variable Mid_s everytime, so you just end up with the very last number. Ch 13 of MATLAB Onramp will in...

6 Tage ago | 0

what code should i use to plot the set of resulting values?

See Ch 9 of MATLAB Onramp.

6 Tage ago | 0

Please assist! Z1= exact solution; Z2= approximate solution. Now i want to plot a 2D graph of the exact and approximate solution in ONE graph to campare the results

See MATLAB Onramp Ch 9

6 Tage ago | 0

Sort timetable in the ascending order of dates

You know the function to use, and by now should cetainly know how to use the documentation. Make an attempt on your own rather t...

6 Tage ago | 0

How can I add slides to an existing ppt presentation?

I found this statement in the documentation: "To add a slide, use the add method with an mlreportgen.ppt.Presentation object. F...

6 Tage ago | 0

System Linearization and PID tuning

You could use the PID Tuner app. When it opens, it will first linearize your model. See here.

6 Tage ago | 0

How to use ode4 with ODE system?

This is not a MathWorks-supplied function. The error message suggests this function does not return 2 outputs. When I look at ...

6 Tage ago | 0

How to visually check equations

You likely need the Symbolic Math Toolbox to do what you want. Note that it it will combine the numeric values in the process. ...

6 Tage ago | 0

How to sum up over dates?

Convert your dates to datetimes and use groupsummary with the groupbins input set to 'day' and your method set to 'sum', and dat...

7 Tage ago | 0

| accepted

How to extract lat and long and height from a $GPGGA string and time match to another file?

I would also suggest playing around with the import tool. Here, you can use a UI to find the right settings to import the data, ...

8 Tage ago | 0

| accepted

I need to solve a system of equations, without the syms command.

Set up your system of linear equations and solve using left divide.

8 Tage ago | 0

| accepted

When I try to run a Simulink model in online MATLAB it crashes. A dialogue box pops that says MATLAB has encountered and unexpected error and needs to be closed

Please report this here.

8 Tage ago | 0

what is this error "error updating text"

By default, labels and legends (among other things) apply a tex interpreter to their text. The '_' is used to indicate a subscri...

8 Tage ago | 0

| accepted

Add variables calculated in a for loop into an array

It looks like you could use some general help on how to write a for loop. Check out the examples on the for documetnation page. ...

8 Tage ago | 0

Why do I recieve the error " Index exceeds matrix dimensions" at line number 28

Your line spacing appears to have changed when you pasted your code here, but the error message means you are trying to index yo...

8 Tage ago | 0

| accepted

Filtering a table with datatime on dates

In the first case, you are not using correct syntax for MATLAB's datetime function (it doesn't accept colons), so MATLAB is assu...

9 Tage ago | 1

| accepted

How to change images dynamically with radio buttons in app designer?

The radio buttion group callback is executed when the selection changes. That is why you have to select image 2 then image 1 to ...

9 Tage ago | 0

| accepted

the streamline plot does not clear in an App while contour does. How do I clear the streamline plot?

Add the following before creating your streamline plot. cla(app.UIAxes2)

9 Tage ago | 1

How to adjust the position of a text on a plot?

Try using the text command, which lets you specify location. text(x,y,txt) For your subplot spacing, try using tilelayout inst...

10 Tage ago | 0

| accepted

Using find command to group data into bins

I wouldn't try to use find. I would try to use discretize, findgroups, or histcounts (or maybe histcounts2) instead.

10 Tage ago | 1