Matt J

Last seen: Today | 自 2009 起处于活动状态

Professional Interests: medical image processing, optimization algorithms PLEASE NOTE: I do not read email sent through my author page. Please post questions about FEX submissions in their respective Comments section.

统计数据

All

查看徽章

Content Feed

已回答
How to solve large linear complex equations
Since it is a linear and unconstrained system of equations, just use mldivide, \

6 hours 前 | 0

已回答
Help with parametrizing a function and creating points
syms x y P [1,2] syms r(t) P1=[x1, y1]; P2=[x2, y2]; r(t)=P1+t*(P2-P1)

6 hours 前 | 0

已回答
How can i extract data from given variables, for suppose i want to extract charge and discharge separately.
I will assume your data is in a table: type=["charge";"discharge";"discharge";"charge"]; data=(1:4)'; T=table(type,data) ...

6 hours 前 | 0

已回答
Wanna find specific index(raw) which meet multiple(~3) conditions
use ismembertol to allow for floating point noise, Index = find( ismembertol([39,13.9,17.2],A, 1e-6,DataScale=1,ByRows=1) )

6 hours 前 | 0

已回答
Does anybody know what the exact meaning of the following command?
It defines an anonymous function of x,y. Everything after @(x,y) is the expression that will be evaluated. E.g., D=@(x,y) x+y; ...

11 hours 前 | 0

已回答
How can I import this data with a for loop?
Data{i} = importdata(compose("PendulumTestData/TD%d/IK/HR_1.mot", x(i)));

13 hours 前 | 2

已回答
How to interpolate 2 dimensions of a 4D array ?
You can use imresizen, to be downloaded from https://www.mathworks.com/matlabcentral/fileexchange/64516-imresizen-resize-an-n-d...

14 hours 前 | 0

已回答
How to avoid NaN in the Mini-batch-loss from traning convolutional neural network?
I found that changing the solver (from "sgdm" to "adam") resolved the problem.

19 hours 前 | 0

已回答
How to represent gray scale images as affine subspaces?
So how Can I get the direction and origins so I can compute the grassman distance? Here is another variant that gives a Basis/...

20 hours 前 | 0

已回答
how to get reference in app designer
It is possible, and what you've shown should have worked, unless your Matlab version is really old. The Code view should show t...

1 day 前 | 1

| 已接受

已回答
How to convert values of 0 to NaN
NaNs will not appear bright on an image display. You would have to replace them with a large value. Image(Image==0)=brightValue...

1 day 前 | 0

已回答
How to have a class that contains multiple functions that is used in other classes?
A static class method can be imported from a package like in this example, https://www.mathworks.com/help/matlab/ref/import.htm...

1 day 前 | 0

| 已接受

已回答
Adding zeros to a column vector to match a larger column vector
This gracefully handles the case when length(x)=length(y), and requires no consideration of whether x,y are row or column vector...

1 day 前 | 0

已回答
Is Conv2 based on direct convolution?
It is not FFT-based. To do FFT-based convolution (using the overlap-and-add method) you could use fftfilt.

1 day 前 | 1

| 已接受

已回答
How to draw a generic cylinder with arbitrary orientation
See this File Exchange download, https://www.mathworks.com/matlabcentral/fileexchange/87584-object-oriented-tools-for-fitting-c...

1 day 前 | 0

已回答
Loading files by replacing some part of the name with a variable
Pre-generate all of the filenames and loop over them. FileNames = compose("GNSS_Validierung_%.2d",(1:41)' )

2 days 前 | 0

已回答
Facing problem in solving simultaneous nonlinear equation with 3 unknowns
What @Dyuman Joshi says is true. However, your equations don't seem to make sense without upper and lower bounds on x. For examp...

2 days 前 | 0

已回答
Assigning row names iteratively
The row names of a table cannot be non-unique, so having the names of the 7 days of the week repeat 52 times would not generate ...

2 days 前 | 0

| 已接受

已回答
Plotting a giant surface exceeding array limitations
First of all, you should consider downsampling from 40000 points to perhaps 400. Having very dense data beyond a certain point w...

3 days 前 | 1

| 已接受

已回答
Partial Fourier transform of large sparse 3D array
There is at most 1 nonzero pixel in each x-y plane (first 2 dimensions) ... I'm thinking of doing 1D Fourier transform on each d...

3 days 前 | 0

已回答
Partial Fourier transform of large sparse 3D array
You can do the partial Fourier transforms by computing a set of partial DFT matrices: dftPartial=@(N,k)sparse(exp(-(2j*pi/N)*(0...

3 days 前 | 0

已回答
Adding more values to an array every loop
One possibility, y=nan(1,100); s=0; for k=1:numel(y) y(k)=2*k-1; s=s+y(k).^2; if s>40, y...

4 days 前 | 1

| 已接受

已回答
My ellipse wont close after running the code .
Can't you just use the native spline() command? theta = linspace(0, 2 * pi, 8); t_x = 2*cos(theta); t_y = sin(theta); dt_x...

4 days 前 | 0

已回答
Newton Raphson to solve a system of non-linear equations
From the surface plot, the equations don't appear to have any solution, or at least no where near the vicinity you are searching...

4 days 前 | 0

已回答
Why is my gamultobj algorithm not working?
My guess would be that it is struggling to find feasible solutions to the nonlinear constraints (perhaps because they don't have...

5 days 前 | 0

已回答
Solve large number of independent systems with fsolve, where some systems do not have a solution
I see no reason why fsolve would "give up" if you've set MaxIterations and MaxFunctionEvaluations to Inf, regardless of whether ...

5 days 前 | 0

| 已接受

已回答
Display long strings that include newlines in a table
I don't think there's a way. But you could write to an Excel file (e.g., with writetable) where multiline cells are possible. >...

5 days 前 | 0

已回答
Dot indexing is not supported for variables of this type.
Have you actually looked at the contents of device? Is it possible that MAI.GetDeviceByIndex(0) returns empty [] because someth...

5 days 前 | 0

已回答
understand in which function the field is filled
If ReportAggreg is created literally with an assignment statement of the form someStruct.ReportAggreg = something it should be...

5 days 前 | 0

| 已接受

已回答
Can I define the relationship between input and output using the raw experimental data in MATLAB. somthing like this .
Yes, you have a choice of lsqcurvefit, fit, and various others.

5 days 前 | 0

加载更多