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Neil Guertin

MathWorks

Last seen: 2 years 前 |  自 2017 起处于活动状态

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已回答
'griddatan' much slower than 'scatteredInterpolant'
The 'griddatan' function and 'scatteredInterpolant' object process the data differently, which leads to the difference in perfor...

6 years 前 | 1

已回答
Robin condition in a 1D FEM matlab code
You may find some useful information here: <https://www.mathworks.com/help/pde/ug/elliptic-pdes.html>

6 years 前 | 0

已回答
WMS Layer "True Color (1 day - Aqua/Modis Rapid Response)" resolution problem
The map returned is the full 2048x2048 pixels, but it looks like the zoom level is wrong. The server might assume the zoom level...

6 years 前 | 0

已回答
How do i map the temperature for the colors ,i.e RGB respectively from a Falsely colored image ( my own code using for loops) ?
You can change the colors in the figure by using a different colormap. A list of built in colormaps are available in our documen...

6 years 前 | 0

已回答
Printing a figure as .eps w/o letting the size change
This is a known issue and our developers are currently investigating. As a workaround, consider: # Using the -opengl optio...

6 years 前 | 0

| 已接受

已回答
AdaBoost Regression to Select Predictors
The fitrensemble function uses the LSBoost algorithm. Then you can use the removeLearners function to remove members of the ense...

6 years 前 | 0

| 已接受

已回答
orthogonal polynomial function in matlab similar to the R function poly()
The Legendre and Jacobi polynomials are orthogonal and can be easily generated in using the Symbolic Math Toolbox. <https://w...

6 years 前 | 0

| 已接受

已回答
What is image what?
Once you have produced the initial unfiltered segemented image, you can use morphological operations such as imopen or imerode t...

7 years 前 | 0

已回答
How can I feed MATLAB's integral2 a vector of parameters using nested functions?
There is currently no way to do this using integral2. As a workaround you could run integral2 separately for each parameter valu...

7 years 前 | 0

| 已接受

已回答
How do I copy over only one legend entry from each plot using copyobj()?
When creating a legend, you can specify exactly the objects you want to appear in it. In this case, you will want to recreate th...

7 years 前 | 3

| 已接受

已回答
Why don't figures show up when I open a live script saved as a HTML file on a different computer?
The CSS and image data should be stored directly in the HTML source file itself. Most likely your browser just isn't rendering i...

7 years 前 | 1

已回答
How Matlab access data in nested structures?
For a situation like this, code readability and adaptability is much more important than performance. Even if one of these metho...

7 years 前 | 0

| 已接受

已回答
Convert datetime to time of day, to be able to plot along time (e.g. 08:00, 10:00, 12:00 14:00...)
Use the timeofday function to convert your datetime objects to duration objects. You should be able to use the duration objects ...

7 years 前 | 0

已回答
evaluate chebyshev polynomials takes too long
No matter how you do it, evaluating a polynomial at 10,000,000 different points is going to take a long time. I would suggest tr...

7 years 前 | 0

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已回答
Change Legend Markers after legend creation in App Designer
There is no currently supported way to get access to the icons of a legend in App Designer. As a workaround you could create an ...

7 years 前 | 1

| 已接受

已回答
Blurry latex text on plots (help!) (matlab 2017a)
Try increasing the resolution when you export the figure. You can do this with the -r option of the print command. <https://w...

7 years 前 | 0

| 已接受

已回答
How to select a region of interest (ROI) from 3-d point cloud data?
Your first approach seems like the right way to do this. However it looks like your ROI is not orthogonal to the axes, and there...

7 years 前 | 1

已回答
Getting number of data points for training, validation and testing of neural network; showing the training and testing data of neural networks?
nntool is an older tool and is not recommended. Use nnstart instead. From there you can get to the Neural Fitting app which has ...

7 years 前 | 0

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已回答
Cannot progress in matlab fundamentals course - matlab academy fails to communicate with workers and closes every time.
Hi Sam, I've notified our Customer Service team about this issue. Someone should reach out to you next week.

7 years 前 | 0

已回答
Why do I receive the error "Undefined function or variable 'usejava'" when trying to start MATLAB 6.x (R12.x)?
Instead of rewriting pathdef.m manually, the safest and best way to regenerate it is as follows: # Delete pathdef.m # Recrea...

7 years 前 | 3

已解决


5th Time's a Charm
Write a function that will return the input value. However, your function must fail the first four times, only functioning prope...

7 years 前

已解决


The 5th Root
Write a function to find the 5th root of a number. It sounds easy, but the typical functions are not allowed (see the test su...

7 years 前

已解决


Energy of a photon
*&#9883 &#9762 &#9883 &#9762 &#9883 &#9762 &#9883* Given the frequency F of a photon in giga hertz. Find energy E of this...

7 years 前

已解决


How to subtract?
*&plusmn &plusmn &plusmn &plusmn &plusmn &plusmn &plusmn &plusmn &plusmn &plusmn &plusmn* * Imagine you need to subtract one...

7 years 前

已回答
Roipoly on UI axes
roipoly and impoly are not supported in App Designer as of R2017b. The error message in R2016b and R2017a says "HPARENT must ...

7 years 前 | 0

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已回答
How to schedule employees that only work continually one shift a day?
Each column of A corresponds to a potential shift for one employee. For example, find(A(:,1)) shows that column 1 has entries in...

7 years 前 | 0

| 已接受

已回答
Why do I receive an error when I try to run MatLab (R2017b)?
This is most likely caused by a firewall, antivirus, or other security software. You must be able to access esd.mathworks.com fo...

7 years 前 | 0

已回答
Piecewise function for black-scholes
piecewise expects a value in the second and fourth arguments, and what you have entered is not valid syntax there. What you n...

7 years 前 | 0

已回答
Matrix condition in ordinal logistic regression
That warning comes from an mldivide (backslash) operation within mnrfit. Since the reciprocal condition number of that matrix is...

7 years 前 | 0

已回答
Error Saving Figure: Error using hgexport (line 1051) Error using print (line 215) Images must contain fewer than 2^32 -1 bytes of data
When saving a .fig file, the entire contents of the figure must be saved for future editing, including all of the data, which in...

7 years 前 | 1

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