Matt J
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Feeds
How to use the nonlinear least square fitting to fit a transfer function？How to improve the fitting accuracy
Assuming the things @Catalytic pointed out above were mistakes, and also if Y is supposed to be the impulse response, then the f...
alrededor de 4 horas hace | 0
How to use the nonlinear least square fitting to fit a transfer function？How to improve the fitting accuracy
Your initial point, T0 = ones(10,1); %% intial values looks very arbitrary. You should devise a smarter initial guess. Aside...
alrededor de 8 horas hace | 0
Why Does polyval Return Zero When the Coefficients are Empty?
For non-empty A and B, we have the general relation, polyval([A,B],z)=polyval(A,z)*z^numel(B) + polyval(B,z) Extending this to...
1 día hace | 0
"Index exceeds 37" when 35 variables?
The root cause, as I commented above, is probably that you've attempted to construct a fit type with 3 independent variables, wh...
3 días hace | 2
Dependency analyzer refuses to work
Do you really need all the features of the app environment for what you are doing? You can analyze dependencies programmatically...
4 días hace | 0
Best way to relabel axis as pi for trig functions.
x = linspace(0,2*pi,200); y = sin(x); plot(x, y) ax=gca(); ax.XTick=0:pi/2:2*pi; ax.TickLabelInterpreter='latex'; ax.XTi...
5 días hace | 2
| aceptada
Efficient overlapping block processing with nested sub blocks (similar to im2col with stride)
If the reordering is something you want to repeat on multiple matrices of the same size and block structure, then you can use yo...
6 días hace | 1
obtain an equation for the curve joining maximum points, using an appropriate interpolation or “curve fitting” process???
I think you are being asked to derive the equation for the maxima by hand -- an easy calculus exercise since the trajectories ar...
7 días hace | 0
identifying shapes in image
See this FEX download, https://www.mathworks.com/matlabcentral/fileexchange/181422-fit-polyshape-to-objects-in-image?s_tid=prof...
7 días hace | 0
SNR goes down as noise filtering is increased.
Depending on the data you provide, the theoretical assumptions of a Wiener filter (signal stationarity, white noise, etc...) ar...
9 días hace | 0
Odd behavior of unstack in Matlab2025b
The change occurred in R2020a and was documented, https://www.mathworks.com/help/releases/R2024b/matlab/ref/table.unstack.html?...
10 días hace | 0
Can I hade the Figure toolbar without hiding the Axes toolbar?
figure(Toolbar='none')
10 días hace | 0
Nested tiledlayout: can parent tiles have different widths depending on number of child tiles?
It might be better to us e a grouped bar plot, e.g., Y = [5 3 7 0 0; 6 4 2 1 0; 4 8 5 1 6]; gradientGroupedBar...
11 días hace | 0
How to change the arrangement of plots in a tiled layout even if the plots are not empty?
One way: tl=tiledlayout('vertical'); for i=1:3, nexttile; plot((1:5)+10*i); title(string(i)); axis square; end tl=transpos...
12 días hace | 0
| aceptada
How do I perform Image segmentation in an RGB image using pattern?
load Image [r,g,b]=imsplit(I); lev=multithresh(r,2); L=imquantize(r,lev); H=bwareafilt( imfill(L==2,'holes') ,1) ; BG= ...
14 días hace | 1
| aceptada
Curve fitting confidence intervals - discrepancy in manual CI plot and predint plot
Also, what is predint and how is this different from manually plotting the CIs as I did? predint predicts an uncertainty inter...
15 días hace | 0
| aceptada
How to preserve the 3d plot box, when changing patch visibility.
Here's something a little fancier, and maybe more robust. It captures (and reasserts) all relevant properties of the plot perspe...
18 días hace | 1
| aceptada
How can I quickly find the eigenvalues and eigenvectors of a matrix with a special structure using high-precision calculations?
@Torsten has hinted, based on your earlier posts, that the eigenvalues of M may occur in distinct and purely imaginary conjugate...
18 días hace | 0
Pregunta
Indexing behavior of table properties
Suppose we have a table such as, T=table(rand(3,1,'single'), randi(5,3,1)) What is it that allows the VariableTypes to be in...
19 días hace | 1 respuesta | 1
1
respuestaHow to preserve the 3d plot box, when changing patch visibility.
Using axis() twice, we can both capture and reassert the axis limits, axis(axis) This also then converts all X,Y,ZLimModes to ...
20 días hace | 0
How can I force a .txt export
Instead of, if length(file) < 4 || ~strcmpi(file(max(1,end-3):end), '.txt') file = [file '.txt']; end use ...
22 días hace | 0
Extracting from cell arrays using a nested loop
Do not use a nested loop: clear Data for k=250:-1:1 Data(:,k,:) = Matrix(zapTime(k)-12000:zapTime(k)+75000, 2:end) ); end...
25 días hace | 0
How to draw the axis in the origin of the coordinate system?
Use export_fig instead, https://www.mathworks.com/matlabcentral/fileexchange/23629-export_fig
28 días hace | 1
Restore data format from SCB to SSCB after patch embedding
One way is to use a functionLayer.
29 días hace | 0
Error forming mini-batch for network input
This is not enough to reproduce the error. You haven't provided input images. My guess, however, is that there are some files in...
29 días hace | 2
Having 'imdilate' function only proceed when there are not a bunch of zero values
Don't use a loop. Use imreconstruct instead
29 días hace | 0
How do I find if a point is within the volume of a rotated ellipsoid
Download AxelRot from here, https://www.mathworks.com/matlabcentral/fileexchange/30864-3d-rotation-about-shifted-axis?s_tid=src...
29 días hace | 0
Pregunta
Resetting a memoized function
I know that clearCache will clear the cache of a MemoizedFunction, but how would you reset its other properties to their default...
alrededor de 1 mes hace | 2 respuestas | 0
2
respuestasDeconvolution using FFT - a classical problem
Since you are trying to deconvolve in the presence of noise, it would make sense to use a regularized deconvolver like deconvreg...
alrededor de 1 mes hace | 0
| aceptada
Morphological Image Processing: Object Identification and Separation
This might be along the lines of what you're looking for. It's semi-empirical though in the way it discards particles. Maximum d...
alrededor de 1 mes hace | 1
| aceptada
