Question

Get coordinates of points from an image
Hello, I would like to know how to obtain the coordinates of p number of random points from an image: how to call an image ( d...

5 years ago | 2 answers | 0

2

answers

Question

Subtraction matrix for all values
column 1 - column 2; column 1 - column 3; column 1 - column 4...(rest of subtractions)..olumn 4 - column 4. How would I appr...

5 years ago | 1 answer | 0

1

answer

Question

Not sure how to solve equations using newton-Raphson method
Can anyone help me solve these two equation using newton-raphson method 5/2*cos(x(1))+3*cos(x(1)+x(2))-5 5/2*sin(x(1))+3*sin(x...

5 years ago | 1 answer | 0

1

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Question

Does anyone have any resources for modelling a distribution network and charging an electric vehicle from it
I want to do a project that solves an optimisation task for Electric Vechile charging from the Low-Voltage power network. Howeve...

5 years ago | 1 answer | 0

1

answer

Question

Filenames in MATLAB - directory
Hello, So currently, what I'm doing it's prompting out window to select folder, I then was thinking of using a foor loop that ...

5 years ago | 1 answer | 0

1

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Question

Export_fig - Ghostscript program not found
Hi, I downloaded the export_fig zip from https://github.com/altmany/export_fig named 'export_fig-master'. I unzipped the fil...

5 years ago | 1 answer | 0

1

answer

Question

for loop with a spread
Hi guys, I wanted to get an idea on how I should approach a problem. Say for example I have a 100x48 matrix and I want to get ...

5 years ago | 1 answer | 0

1

answer

Question

How to display images from nifti file format in Matlab?
I have a COVID-19 CT segmentation dataset where all images are in .nii file format. Each image file has mulitple slices (512*51...

5 years ago | 1 answer | 0

1

answer

Question

is it a normal display of the command window on MATLAB for window? and how to fix if it needs attention?

5 years ago | 1 answer | 0

1

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Question

String scalar or character vector must have valid interpreter syntax.
I want to add: ylabel('$\mid H(f) \mid$ (kg{s^{-1}}/kg{s^{-1}})', 'interpreter', 'latex'); Where I want the first part ins...

5 years ago | 1 answer | 0

1

answer

Question

reinforcement learning toolbox ---fail to train stores saved agents in a MAT-file in the folder
%% Train Agent doTraining = false; if doTraining % Train the agent trainingStats = train(agent,env,trainOpts);...

5 years ago | 1 answer | 0

1

answer

Question

String scalar or character vector must have valid interpreter syntax.
I want to add: ylabel('$\midH(f)\mid$ (deg/m)', 'interpreter', 'latex') error: String scalar or character vector must have va...

5 years ago | 3 answers | 0

3

answers

Question

Cannot plot iterations.
I'm trying to plot iterations but it doesn't seem to be working. The figure pops up but no points do. This is confusing because...

6 years ago | 1 answer | 0

1

answer

Question

How to find settling time?
Hello I want to be able to find the time taken (number of frames) for each of the peaks to reach the new stabilising value in ...

6 years ago | 1 answer | 0

1

answer

Question

How to locate significant points in a graph?
Hi So I've plotted a graph of two variables from a 118000x2 matrix: Frames and Conductivity. I've attached a picture of the gra...

6 years ago | 1 answer | 0

1

answer

Question

4d plotting with slices
Hello :) I have 4d data (x y z coordinates and and V). I am hoping to represent the data similar to the slice function approa...

6 years ago | 1 answer | 0

1

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Question

Plot 4d data
hi :) how can one import an excel sheet with x, y, z and V columns as a 3d matrix? I am trying to plot the V values over a co or...

6 years ago | 1 answer | 0

1

answer

Question

Trouble with MATLAB Triple Integral
I'm attempting to evaluate this integral (and equation) where 'a' and 'x' are just inputs, and x' is (x,y,z). also: x will hav...

6 years ago | 1 answer | 0

1

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Question

Beginner MATLAB question (I just started using matlab a week ago)
Please help give the function to solve this. Thank you

7 years ago | 1 answer | 0

1

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Answered
Dummy Variable ased on categorical vars in table
Thanks!! Now I tried Data.DV = zeros(27,1) for x = 1:27 if strcmp(Data(x).BS, 'Total assets') Data.DV(x) =1; ...

7 years ago | 0

Question

Dummy Variable ased on categorical vars in table
hi everyone! I'm tying to create a dummy variable in a table based on two categorical variables. My table contains numerical a...

7 years ago | 3 answers | 0

3

answers

Answered
Needed frequency analysis of 3D Plot obtained from Manometry of Human colon using wavelet analysis.
One approach for this problem would be split the data into two components, i.e. sensor position as a function of time and amplit...

7 years ago | 0

Question

I have code which calculates the electric potential due a single charge. The results are concentric circles (Correct results) but don't match the theoretical data
Here is the code clear all; close all; clc; Nx = 11; %% Dimension of x axis Ny = 11; %% Dimension of x axis eps0 = 8.85e-12...

7 years ago | 1 answer | 0

1

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Question

Lock scroll position when continuous uitable updates
Hi, I have a uitable that has a live data subscription that is being refreshed every x seconds. However, if you are scrollin...

7 years ago | 1 answer | 0

1

answer

Question

Nested Tables and UI Tables. Using GUIDE UI figure.
Hi, I want to have an interactive figure with a ui table in it. However, I want to display the table such that: * Outer table...

7 years ago | 1 answer | 0

1

answer

Answered
Wavelet Webinar, example mistake!!!
This topic has been addressed here: https://www.mathworks.com/matlabcentral/fileexchange/59924-wavelet-tech-talks-matlab-cod...

8 years ago | 0

Question

how can I remove the background this image , I do thresholding but I can't remove the background( I want only the dark object and determine their location) ?
<< <</matlabcentral/answers/uploaded_files/107126/bio1.jpg>> >>

8 years ago | 1 answer | 0

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Question

Subscript Indices must either be real positive intergers or logicals - not sure where i'm going wrong.
I am trying to call the RK4 function below in order to find the second initial value for my main function. However it gets stuck...

8 years ago | 1 answer | 0

1

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Question

What is a simple code for the chapman cycle involving only hydrogen and oxygen.This code should produce a curve but it only produces straight lines?
function Chapman_cycle y0= [2e17 1e-6 5e12]; tspan=[0 100]; %tspan=[0,1.0e-5,1.0e-3,0.1,0.5,1,2,4,6,8,10,20,30,40,50,...

8 years ago | 1 answer | 0

1

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Question

Hello can someone show me a simple code to show the earths orbit around the sun using ordinary differential equations.
function Earthsorbit e=2; y0=[1 2*pi 0 -pi]; tspan=[0, 10]; options = odeset('RelTol',1e-4,'AbsTol',1e-4); ...

8 years ago | 2 answers | 0

2

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