Answered
Daily mean through long time
T1 = readtable('data.xls') % Import Data DateTime = datetime([T1{:,1:5} zeros(size(T1,1)...

2 months ago | 1

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Answered
Combine multiple varying length double arrays into one timetable
First, convert the datenum values to datetime arrays using the ConvertFrom='datenum' name-value pair, either reading each of the...

2 months ago | 0

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Solving non linear system with fsolve
It seems that fsolve stopped when it converged. R = 1.0e-20 * [ 0.1251 -0.0001 -0.0000 -0.1019 -0.0008 -0.00...

2 months ago | 0

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Finding point of zeta line & rootlocus
I am not certain what you are starting with, so I cannot provide an exact response. However one approach may simply be to use i...

2 months ago | 0

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How to randomly select the datapoints in a vector based on percentage for each group?
I’m not certain iif you want to apportion them as they exist in the original vector, or if you want to apportion them by ascendi...

2 months ago | 0

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How to simplify output from solve
I can’t be certain that this is a significant improvement, however it is the best I can do with your data — % Define symbolic ...

2 months ago | 0

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How can i make optimization by using genetic algorithm to minimize error between desired and simulated force?
Your fitness function should be something like this: fitness = @(b) norm(dependent_variable - model_function(b,independent_var...

2 months ago | 0

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Parfor random numbers are not quite random
Sequences generated by computers are called ‘pseudorandom’ because they are just that. They are generated cyclically. See Mo...

2 months ago | 0

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How to save contourf data and not plot it for running efficiency?
Use gcf to return the figure handle, then set the visibility to 'off'. Example — [X,Y,Z] = peaks(50); figure [c,hc] = c...

2 months ago | 0

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How can I disable the 'select a website' pop-up every time I open the MATLAB help documentation?
I believe this has recently been resolved. See this Answer.

2 months ago | 0

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generate a 3d scatter plot with z-support lines / pin plot / needle plot ...
See if the stem3 function will do what you want. You will probably still have to use a loop of you want the individual stems ...

2 months ago | 1

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Answered
How can I shade an interval in a calculus function with the area() function?
I prefer the patch function, simply because I have more experience with it. Try this — x = linspace(0, 1); y = 1 + 0.5*sin...

2 months ago | 0

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Problems with creating a data table
You probably do not have to do any of those data manipulations. Just read the file eand plot the results — T1 = readtable('...

2 months ago | 0

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morse code translator not outputting sound
When I ran your code with an appropriate argument, I got: Unrecognized function or variable 'morsecode2'. Beyond that, I juat...

2 months ago | 0

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How to plot an array of 4 columns?
I wrote this to solve a similar problem. The original problem was to create a surf plot to match a scatter plot. Try this — ...

2 months ago | 0

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I keep on getting the error conversion to double from table is not possibl
I am not certain that I understand what you are doing. It would probably help to upload the matrix (text or Excel file) to he...

2 months ago | 0

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How to use Wilcoxon signed-rank test and correct for multiple comparisons?
The signed-rank test is for paired studies (for example the same group before and after an intervention) and ranksum for unpaire...

2 months ago | 1

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cannot find function even it is in path
I am not certain what your problem is. In my startup.m file, I have these assignments at the beginning: pathmat = path; My...

2 months ago | 0

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How to color a contour of two curves?
I am not certain what you want. Try this — % Diagramme de coexistence avec des contours colorés % clc; clear; close all; ...

2 months ago | 0

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How to correct for multiple comparisons when using fitlm function?
None of the linear regression coefficients are even remotely significant (other than the Intercept). A linear regression is l...

2 months ago | 1

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extract fig into surf(x,y,z)
One way is tto enlarge the y-values to a matrix using repmat and then offset them by adding a different constant to each column ...

3 months ago | 0

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How to use "predict" to get x value for a given y value?
I generally use the interp1 function to return x-values given y-values. That generally goes something like this — x = lins...

3 months ago | 0

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I need help converting this 3d plot to a surface
Plotting it as a surface will probably require creating matrices from the vectors. Just looking at the images, that will probab...

3 months ago | 0

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How to read each column of a .BIN file as a different variable
I suggest using ‘ArduPilot Log Viewer’ once to see what the format of the file should look like (and check to be certain that ...

3 months ago | 0

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isolate function is not providing multiple solutions to a polynomial problem?
Apparently isolate does not, however solve does — syms x a b c eqn = a*x^2 + b*x + c == 0; xSol = solve(eqn, x) pretty(xS...

3 months ago | 0

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Spectrometer signal processing.
One approach — Data = {1729167932375 '13:25:32.375' 405650.13 1729167932475 '13:25:32.475' 400621.04 17291...

3 months ago | 1

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Why do each curve appears to be two when I zoom in on them?
Your code must be plotting them that way (original and one with a slight offset). We cannot determine what you are plotting wit...

3 months ago | 0

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How to extract the term associated with a symbolic variable and assign to another symbolic variable?
Useee theee function to find an expreessiion for — syms R_v L_v L_ph U_s U_i w s U_sr U_si real syms Z_v Z Y S sympref('Ab...

3 months ago | 0

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How to express rest of expression in terms of other variables
Try this — syms p K_B Phi_V Phi_G s K_i K_p real; Phi_G = p/s*(K_p + K_i/s) Eqn1 = p == K_B*(Phi_V - Phi_G) Eqn2 = isol...

3 months ago | 0

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Answered
How to calculate the average of each column without taking zeros values
Try thiis — matrix = [1,3,5,0,0,0; 2,0,3,4,0,0; 3,0,0,3,0,1;4,2,2,1,8,2; 5,3,3,0,5,0; 6,7,0,0,2,0] matrix(matrix == 0) = Na...

3 months ago | 0