# Cris LaPierre

### MathWorks

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**Content Feed**

Trying to code from Polymath

I recommend going through MATLAB Onramp. It's free, and takes about 2 hours. That should give you the necessary skills to code t...

alrededor de 4 horas ago | 0

how can I take mean of fourth dimension of daily data?

I see your times are recorded as decimal days: Times = 0 0.1250 0.2500 0.3750 0.5000 0.625...

alrededor de 8 horas ago | 0

Can anyone please help ?

This error message means your code is taking too long to execute. This is usually caused by accidentally creating an infinite lo...

alrededor de 19 horas ago | 0

Can someone help with error "index exceeds number of array elements"? I attached image as to what it needs to look like..

The error means you are indexing a variable using an index value that is greater than the number of elements in your variable. ...

alrededor de 19 horas ago | 0

Is there any algorithm to find out how much time it took the signal to reach it's peak point. We can find it out manually, but is there any function or algorithm to calculate?

What comes to mind are the following: Find change points live task - add this task in a live script to interactively find abrup...

alrededor de 19 horas ago | 0

Changing content between 2 tab delimiters

I'd use readtable to load the data into MATLAB, and then make the changes to variable Q. See the Access Data in Tables doc page....

2 días ago | 1

| accepted

For every time stamp t do

Ch 12 of MATLAB Onramp introduces how to write if statements and for loops.

3 días ago | 0

Plot the same color for all iterations of a loop

I don't see any code for actually creating the plots, so it's hard to understand exactly what you are doing. If you do not spec...

3 días ago | 0

Latex Interpreter Not Producing Expected Results

The problem is that x2unit contains symbols that have meaning in LaTeX markup in MATLAB. Consider including your unit inside the...

4 días ago | 1

| accepted

Have the user input a filename containing an ODE, which has to be passed to a function.

The problem is that (t,[x1_mesh(i); x2_mesh(i)]) is being treated as indexing your variable MODE. It is not being recognized as ...

5 días ago | 0

Computing displacement from accelerometer data

I think the first issue is to find the magnitude of the acceleration vector using the data from all 3 axes. From there, you can ...

6 días ago | 0

How I can Plot Data Samples as Data values in Y-axis and Sample counter converted to micro second values in X-axis? Then get average and standard variation values?

I highly recommend going through MATLAB Onramp, but the quick answers are 2. Select your x values, then use Ctrl+click to selec...

6 días ago | 0

Removing rows with empty values in table

Empty is not a recognized missing value in MATLAB, so rmmissing does nothing. Missing values are defined according to the data ...

7 días ago | 0

| accepted

Problem in "Increasing Automation with Functions > Creating and Calling Functions > (5/5) Create and Call Local Function", Task 1, MatLab Fundamentals

I just tested it, and it works find for me. Can you share a screenshot of what you are seeing? Try exiting the course and then ...

9 días ago | 0

Driving, Cycling, and Walking Activity Recognition with Accelerometers: How to distinguish between the activities using data obtained from an accelerometer?

I would point you to the following examples Human Activity Recognition Simulink Model for Smartphone Deployment Human Activity...

10 días ago | 1

| accepted

Index in position 1 is invalid. Array indices must be positive integers or logical values.

I believe the issue here is that many of the values of vidIn are 0, which is not a valid index of htextinsCent. In MATLAB, your ...

11 días ago | 0

Create a script circle.m that will which receives diameter as an argument and returns two outputs area and circumference. your script should prompt to give diameter

You are creating a function, while the instructions say to create a script. You might be interesting in the input function.

11 días ago | 0

Expanding Array as following;

What about this? A=[1 0 0 1]; B = [A;A;A]; B = B(:)'

11 días ago | 0

Workspace doesn't show varaibles in MATLAB online

Can you share a picture of your session? I haven't been able to duplicate the behavior. Try logging out and logging back in. If...

11 días ago | 0

MATLAB thinks my entire script is commented, no idea why.

How was this file created? When I open the attached file in MATLAB, there are a lot more spaces between each letter. When I o...

11 días ago | 0

| accepted

cumsum function question for integration

It has to do with the fact that sin(t) starts at 0 and is positive until pi. cumsum is just adding up the Y values, so it oscill...

12 días ago | 0

I want to do exponential fitting for power decaying with time

The easiest approach is to use the Curve Fitting app inside a live script. This does require having the Curve Fitting Toolbox in...

12 días ago | 0

Plot dynamics of an ODE

I'm assuming your goal is to plot a line for when the function rs is equal to zero for various values of p. You could do that us...

12 días ago | 0

| accepted

Matlab User Interface - how can I fit more script in one line?

See this answer: https://www.mathworks.com/matlabcentral/answers/89333-how-to-increase-the-portion-reserved-for-writing-in-edit...

12 días ago | 0

| accepted

Create/Export .stl file from a mesh

You can use the stlwrite function that ships with MATLAB. However, you do need to turn your mesh into a triangulation opject fir...

18 días ago | 0

| accepted

Why is the run option greyed out here? What am I doing wrong with this function?

It is grayed out because you must call a function with inputs in a live script. See the note at the bottom of this page: "Runni...

20 días ago | 0

How to use a slider

My preference would be to create app (simple tutorial incorporates a slider to adjust a plot), or perhaps use a live script with...

20 días ago | 1

| accepted

My matlab code with interp3 is not providing me correct answer. Please help.

I suggest looking at the description of what the inputs to interp3 can be. By taking the unique value of X, Y, and Z, you are l...

21 días ago | 1

Create an 1D array x from 0 to 10 interval size 0.5

See MATLAB Onramp, Ch 4 covers creating vectors and matrices.

21 días ago | 0

Why do I get the error message : 'Too Many Output Arguments' when I try to execute a function?

What function are you trying to call that is giving you the error? The code you shared doesn't use either of the functions you h...

22 días ago | 0