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# darova

##### Last seen: 5 months ago
1,266 total contributions since 2019

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Quiver Transparency and Shape
use patch to manipulate edgeAlpha cla t = linspace(0,2*pi,30); [x,y] = pol2cart(t,1); patch(x,y,t,'edgealpha',0.5,... '...

5 months ago | 0

How I make my phase portrait for several initial condition?
Here is a simple example x0 = [1 2 3]; for i = 1:length(x0) [t,x] = ode45(f,[0 2],x0(i)); line(t,x) end

5 months ago | 1

How to solve 2 equations with 2 unknowns and for Loop
remove all (i) parts try vpasolve (numerical solver) insteaf of solve (symbolical solver). Your equations can be too complicate...

5 months ago | 0

How to get XYZ coordinates of a 3D image (.obj)
use get x = get(obj,'xdata');

5 months ago | 0

How to find the area if the traced are in the graph graph?
select points you need use trapz or polyarea y = [40 40 30 20 15 15 22 33 46 56 48 26 20 20]; x = [1 2 3 4 5 6 7 8 9 10 11 12...

5 months ago | 1

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I was wondering if this code could be vectorized, and if so, can it be done without conditionals or loops? It would be great if the vectorized form could be written out so that I could run and follow
use impoly to create triangle region tri = ones(height); imshow(tri) p = impoly(gca,[0 1; 1/2 0; 1 1]*height); tri1 = p.crea...

5 months ago | 1

plotting in for loop
See my recommendations

5 months ago | 0

How can I color the region bounded by two level curves of countour plots?
extract data from contour function use polyxpoly to find intersection segments

5 months ago | 0

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How to divide a closed detected edge of an image into 8 parts from a point inside in it..?
use bwboundaries to get coordinates of a circle divide into equal parts x(1:end/8)

5 months ago | 0

Plotting 3D Animation from 4-D Data
Here is the start clc,clear load 4D_Data.mat % initialization of surfaces for j = 1:size(T_adi,3) h(j) = surface(...

5 months ago | 0

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How can I count scatter data surrounded by shapes?
Use inpolygon

5 months ago | 0

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How to solve this fourier series/ boundary value on matlab?
here is a start function res = f(t) if t < 1 res = t; elseif t < 2 res = 1; else res = 3-t; end end and us...

5 months ago | 0

3D-Surface between 2 lines.

5 months ago | 0

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Custering data by color
here is an example. Adapt it for you needs % generate some data t = linspace(0,2*pi,1e4)'; x = cos(50*t) + 0.8*cos(t); y = s...

5 months ago | 1

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How to find data points from a 3D plotted graph in MATLAB
use griddata y1 = griddata(X,Z,Y,x1,z1);

5 months ago | 0

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How to put X on intersecting points and find an angle
Try this script

5 months ago | 1

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How to divide a graph into 8 equal region and assign a number for each region?
Here is the start x = 0:.2:20; x = [x'; nan]; % add 'NaN' to break the line y = sin(x); c = round( (1:length(x))/length...

5 months ago | 0

Obtain data points from plot using 'buttondownfcn' nested functions
Here is an example function main x = rand(100,1); % generate random data y = rand(100,1); h = plot(x,y...

5 months ago | 0

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ode45 error rungg- kutta
You probably run the code in a wrong way. Here are some changes

5 months ago | 0

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Extracting data from a graph image using 'ginput'
here is an example x = rand(100,1); % generate some data y = rand(100,1); plot(x,y,'.r') p = ginput(1); d ...

5 months ago | 0

By tonight I'd like to create an image from RGB data in a file
I think you are looking for griddata

5 months ago | 0

How to Seperate Region of Interest into 3 Segments
Adapt this example for your needs [x,y] = meshgrid(1:100); I0 = (x-50).^2/4 + (y-50).^2 < 20^2; % create ellipse [i1,j1] =...

5 months ago | 0

How do I select a region on a 3D plot and extract the indices of the enclosed points?
Here is the script that sould be helpfull

5 months ago | 0

Can anyone help with this error? (I just want to see the contour of the bluish area at the bottom of the image)
Detect blue region properly I0 = imread('frame75.jpg'); I1 = double(I0); % colors from blue region R = [80 50 0]; G = [...

5 months ago | 0

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How to Plot Stress Contour??
Reshape your data to create a matrix stress = reshape(Sigma_X,6,3); And use pcolor [x,y] = meshgrid(1:3,1:6); Sigma_X = 1.0e...

5 months ago | 0

How to draw circles at the start of a video and display these circles again at specified framecounts?
You already wrote if statement for the first frame if framecount == 1 Add another condition for each 5 frame if framecount ==...

5 months ago | 0

Counting line particales in an image
binarize image use imopen to remove thin objects (lines) detect lines use bwlabel to calculate the number of lines

5 months ago | 0