回答済み
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 ...

6年弱前 | 0

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

6年弱前 | 0

回答済み
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] =...

6年弱前 | 0

回答済み
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

6年弱前 | 0

回答済み
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 = [...

6年弱前 | 0

| 採用済み

回答済み
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...

6年弱前 | 2

回答済み
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 ==...

6年弱前 | 0

回答済み
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

6年弱前 | 0

回答済み
if else statement for tabular data classification
Try for loop

6年弱前 | 0

回答済み
I have surface data stored in faces and vertices. How to extract data in a slice (or 2D plane) from this Faces and vertices data?
Use interp2 [x,y,z] = peaks(20); x1 = linspace(min(x(:)),max(x(:)),20); y1 = sin(x1); z1 = interp2(x,y,z,x1,y1); surf(x,y,z...

6年弱前 | 0

回答済み
Projection of 3D positions histograms in planes XY, YZ, and XZ
Here is an example m = 20; % generate some data n = 500; x = randn(500,1); y = randn(500,1); z = randn(500,1); % ...

6年弱前 | 0

| 採用済み

回答済み
How to plot three dimensional triangular based pyramid?
Here is the way [x,y] = pol2cart(deg2rad(0:120:360),1); x1 = [x*0; x; x*0]; y1 = [y*0; y; y*0]; z1 = [x*0+1; x*0; x*0]; sur...

6年弱前 | 0

| 採用済み

回答済み
How to modify values in an array at a certain point inside a loop?
Just add if condition inside your for loop clc clear all a=1.4 for i=1:10 %Here i represents years A(:,:,i)=a; %...

6年弱前 | 0

| 採用済み

回答済み
Colored gradient fill under curve
Use alphaData property, set facealpha to interp x = 0:0.2:10; y = sin(x)+10; xx = [x;x]; yy = [y;y*0]; surf(xx,yy,xx*0,... ...

6年弱前 | 0

| 採用済み

回答済み
Voxel export into stl file
What about isosurface? clc,clear clf r = 10; [x,y,z] = meshgrid(-r:r); v = x.^2+y.^2+z.^2<r^2; h = isosurface(x,y,z,v,0.9)...

6年弱前 | 1

回答済み
finding the area of segmented region
Try this I0 = imread('image.png'); I1 = double(I0); imshow(I0); h = msgbox('pick a color'); uiwait(h) p = round(ginput(1))...

6年弱前 | 1

回答済み
How to create multiple graphs based on a variable that goes into a for-loop?
Maybe you need only one more for loop expansion = [1 2 3 4]; x = 0:10; % data for k = 1:length(expansion) y = sin(x)*ex...

6年弱前 | 0

| 採用済み

回答済み
get the inflection points of a contour
Here is a start: use boundary function to find (x,y) coordinates of your contour (and order) Smooth the curve: reduce points a...

6年弱前 | 0

回答済み
Find Specific Faces on a 3D PDE DiscreteGeometry/ThermalModel
Here is an example [x,y] = pol2cart(pi/4:pi/2:2*pi,1); % rectangle gd = [2;length(x);x(:);y(:)]; % geometry description...

6年弱前 | 1

回答済み
How to find the area for each regions with different pixels intensity
See this trick I0 = imread('image.png'); kk = unique(I0(:)); for i = 1:length(kk) I1 = I0 == i; imshowpair(I0,I1) ...

6年弱前 | 0

回答済み
What's the best way to interpolate the vertices of a polygon?
The best way is described here: Interpolation of 3D point data

6年弱前 | 0

| 採用済み

回答済み
How can I cut the connection between the areas?
Try surf x = [time; time]; y = [Ventricle; min([Ventricle;Atrium])]; surf(x,y,x*0,'edgecolor','none','facecolor','r')

6年弱前 | 0

| 採用済み

回答済み
Odd symsum, loop or another way?
use numerical approach [x,y,k] = meshgrid(-1:0.1:1, -1:0.1:1, 1:2:5); u = zeros(size(x)); f = -(16./pi.^3.*(sin(k.*pi.*(1 + x...

6年弱前 | 1

| 採用済み

回答済み
Trying to use an ODE solver for a convergent divergent nozzle. I don't understand why it's telling me the number of elements on the left and right side are different and its not showing anything in the workspace for me to figure it out.
Create breakpoint before the line you have an error using F12. You will find out that variables you are trying to use are empty ...

6年弱前 | 0

回答済み
How to Threshold Crop an Image for analysis
Maybe simple binarization? I0 = imread('image.jpeg'); I1 = I0(:,:,3); I2 = im2bw(I1,graythresh(I1)-0.1); imshowpair(I0,I2,'m...

6年弱前 | 0

| 採用済み

回答済み
Solve-Unable to find explicit solution
I think you can't find symbolical expression/solution for this equation. It's too complicated Define all known constants/variab...

6年弱前 | 1

| 採用済み

回答済み
How to detect cheek from face detection?
Try intersection of an eye and nose See the scheme

6年弱前 | 0

| 採用済み

回答済み
Find a row with all elements satisfying a condition
Use logical indexing mat = [20, 3; 43 0; 8 3; 100 3; 3 9] ix = sum(mat<10,2)>1; a1 = mat(ix,:)

6年弱前 | 0

回答済み
3D plot from tables in timeline
Can you interpolate your data to make it equal size? Concantenate it and use surf

6年弱前 | 0

回答済み
Plot surfaces with random peaks
What about griddata? x = rand(20,1); y = rand(20,1); z = rand(20,1); [x1,y1] = meshgrid(0:0.05:1); z1 = griddata(x,y,z,x1,y...

6年弱前 | 0

| 採用済み