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Star Strider


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13,095 2012 年以降の合計貢献数

Hic sunt dracones!

PROFESSIONAL: Physician (M.D.): Diplomate of the American Board of Internal Medicine; M.Sc. Biomedical Engineering: Instrumentation, Signal Processing, Control, System Identification, Parameter Estimation

NON-PROFESSIONAL: Amateur Extra Class Amateur Radio Operator; Private Pilot, Airplane Single Engine Land, Instrument Rating Airplane; Gamer

NOTE: I do not respond to emails or personal messages, unless they are about my File Exchange contributions.

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Change value for another value
Consider this example: A = [99999 rand(1,2); rand 99999 rand; rand(1,2) 99999]; B = A; B(A == 99999) = 0 producing: A = ...

約3時間 前 | 1

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Inter-rater reliability
If I understand what your data are and what you want to do, The correct test for your data is Fleiss’s kappa statistic. As I re...

約5時間 前 | 0

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Edge distortion when resampling a signal
From the documentation: ‘When filtering, resample assumes that the input sequence, x, is zero before and after the samples it ...

約6時間 前 | 0

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x greater than y by some value
Perhaps: z = x > (y + 10)

約8時間 前 | 0

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3D Plotting in matlab
I assume ‘complex’ just means complicated, and not a function with real an imaginary arguments or output. If it is actually com...

約8時間 前 | 0

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plotting ode warning with nor plot returned
It helps to look at the dsolve results: Bsol = S.B Asol = S.A that are: Bsol = 0 ...

約8時間 前 | 0

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RMSE between original and predicted values.
Please see my Comment replying to your Comment.

約9時間 前 | 0

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standard deviation on power vs. frequency graph
It would help to have your data, however I created some to illustrate the approach: f = linspace(0, 0.5, 25); ...

約10時間 前 | 0

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How to plot two MATLAB polar plot in a single figure?
The hold calls must go after the appropriate figure call, not before it. Example— a = linspace(0, 2*pi); r1 = abs(cos(a));...

約11時間 前 | 1

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Multiple Linear Regression using fitlm function
In a linear regression of any sort, there is only one intercept.

約11時間 前 | 0

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How to calculate the derivate of an equation ?
To calculate a numerical derivative of a vector, use the gradient function. If ‘N’ is a vector, use gradient on it, then mult...

約12時間 前 | 0

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take values from old matrix to newer
Create the output matrix ‘B’ as: B = A(all(A(:,3:5) >= 0, 2),:) % Result Example— A = [randi(9...

約12時間 前 | 0

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Matlab gives no result when I use the ODE (Ordinary Differential Equations)
The differential equation is nonlinear (the ‘y^2’ term) and very few nonlinear differential equations have analytic solutions. ...

約12時間 前 | 0

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How to filter data that detects peaks or irregularities?
Several functions already exist to do that, among which are findpeaks, islocalmax, ischange, and others.

約14時間 前 | 0

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Get an image as an input from webcam
I assume here that you are using a USB webcam, and not the Image Aquisition Toolbox. To take picture, use the snapshot functi...

約23時間 前 | 0

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How to get a 3D image from 2D countourf?
Black surf plots are common with very densely-gridded data. To avoid that, set 'EdgeColor' to 'none': D = load('Pedobarograp...

1日 前 | 0

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Reverse calculate a table of values
I am not certain what a ‘3D table’ is. Perhaps you intend a three column table or array. If that is true, then the interp1 f...

1日 前 | 1

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Sequence a_n =1/n
Use element-wise division: n = 1:100; format short Seq = 1./n producing: Seq = 1.0000 0.5000 0.3333 0.2500 ...

1日 前 | 1

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Calculate area under curve of multiple peaks
Using cumtrapz: [peaks,loc]=findpeaks(crestbar, 'MinPeakProminence', 30); [trofs,troflocs] = findpeaks(-crestbar, 'MinPeakPro...

1日 前 | 0

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We need to install Global Optimization Tool
Try running these lines from a script or your Command Window first: restoredefaultpath rehash toolboxcache That may fix th...

1日 前 | 0

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convert plot3 to contour plot
Use the griddata function: a = randi(9, 10, 3); x = a(:,1); y = a(:,2); z = a(:,3); xv = linspace(min(x), max(x), 6); ...

1日 前 | 0

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Index exceeds matrix dimensions error "for my code"
It is unfortunate that we do not get the opportunity to see what ‘X’ is for the various files, nor anything else about them. ...

2日 前 | 0

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this is a part of my test and i cant find the mistake in this .
The obvious observation is that ‘x’ is going to be less than 10 from the initial iteration through how many iterations it takes ...

2日 前 | 0

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Error in saveas, Invalid figure handle
I cannot run your code because I do not have the necessary files. However: %% Let's plot T and RH times...

2日 前 | 0

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Custom colour bar, excluding the Blue from RGB.
Define ‘CustomColourMap’ as: CustomColourMap = @(x) [linspace(0,1,x).' linspace(1,0,x).' zeros(x,1)]; then to use it: Cust...

2日 前 | 0

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how to make fuction from changing varibles
That is relatively straightforward to do with ndgrid or meshgrid. Try this hypothetical example: Z = @(x,y,z) x.^2 + y.^2 +...

2日 前 | 0

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Add 0.5 *0.5 degree grid on figure (country)
This illustrates the general approach: x = linspace(44, 64); y = linspace(25, 40); t = linspace(0,2*pi); circx = 0.25*(ma...

2日 前 | 0

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How can i plot with if statement ?
Try this: x=[10 20 30 40 50 ] ; for k = 1:numel(x) if x(k)==10 y(k)=((10*10^6)*.1523)./ x(k) ; end if...

2日 前 | 0

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Make a Plot using loop
Subscript ‘Cp’ and the plot magically appears! Dg=150; %mg Vd=50; %L Ke=0.4; %h^-1 Ka=1.6; %h^-1 t=0:0.1:10; for k = 1...

2日 前 | 0

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titel for tables with spce between the words
The R2019b release allows spaces and other (inluuding Unicode) characters in table variable names. Upgrade to it and you will b...

2日 前 | 1

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