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How can I plot a mesh, surface or a contour from discrete vector data ?
If your data is in vector form use griddata to create 3D array x = linspace(min(X0(:)), max(X0(:)), 50); y = linspace(min(Y0(:...

6 years ago | 1

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Scaling of intensity value of captured jpg image
I'm not familiar with DICOM images but looks simple: I1 = imread('3.jpg'); I2 = rgb2gray(I1); I3 = I2-min(I2); ...

6 years ago | 0

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Generation of similar vectors
What about interp1()? load data.mat y = data; x = 1:length(y); x1 = linspace(x(1),x(end),1000); y1 = interp1(x,y,x1); ...

6 years ago | 0

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How to use fillup3 to color shape?
One aproach p=[11,10,16]; q=[11,10,18]; r=[15,9,18]; M=[p;q;p;r;q;r]; i = randi(6,1,6); % mix indices cm = jet(6);...

6 years ago | 0

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Is there a way to mark a certain point a 3D plot plotted by the mesh function?
Yes. THere are a few methods: plot3(), scatter3()

6 years ago | 1

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How can I add a diagonal gradient and corresponding colorbar to a plot?
An example: [X,Y] = meshgrid(1:0.1:3); Z = X+Y; pcolor(X,Y,Z) shading interp colorbar('Location','NorthOutside') You can a...

6 years ago | 0

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Plot 3D matrix with complex values
Try pcolor pcolor(A(:,1,:)) % display first matrix

6 years ago | 0

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How to draw circle in a 3D space?
Another version Rotation matrix from HERE

6 years ago | 0

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Scaling color with selected axis data
Why not use surf()? Color lines using patch() clc,clear % parameters x= [0:1:30]' ; y= linspace(0.1,10,length(x)) ; [X,Y...

6 years ago | 0

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Answered
Variable cannot be overwritten in an if loop
Just remove

6 years ago | 0

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plot volumetric spherical coordinate data
Use isosurface to plot data at specific value example clc,clear % generate some data theta1 = linspace(-1,1,60)*pi; p...

6 years ago | 0

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How to calculate left ventricle ejection fraction?
There is an example with using impoly I = imread('img1.png'); imshow(I) h = impoly; % draw polygon msk = h.c...

6 years ago | 0

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How to compute equation only for x(y>0)
Take Ew where Pw>0 Ew = (1369*((alphaa*x)+(alphar.*y)+(alphai*z)))/1000 % alphaa and alphai are constants. alphar is only one d...

6 years ago | 0

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How to make a scatter plot of a 2D field in a map and add contour lines of a different field in the same map, without the contour command messing up with the color scale of the scatter command?
Max value of batim is 1000, so MATLAB automaticaly rescale color range for [0 1000] try set(gca,'Clim',[0 30])

6 years ago | 1

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How to plot in for loop?
You re comparing wrong variable if i<18.5 % maybe bmi(i) < 18.5 Forgot hold on hold on You draw all data together ins...

6 years ago | 1

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Solution of non linear equation
Maybe there is no such a and c! I used isosurface to create several combinations: clc,clear cla [a,c,y] = meshgrid(0:0.5:5)...

6 years ago | 0

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plotting a volume data in x and y plane
Use volumeslice() or contourslice()

6 years ago | 0

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Surf plot with a mask
Use CData property: [X,Y] = meshgrid(-5:5); Z = -X.^2-Y.^2; C = rand(size(Z)); surf(X,Y,Z,'Cdata',C)

6 years ago | 2

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Answered
help me to write a code for processing an audio signal using taylor series
Try gradient instead of diff dx = gradient(x); dx2 = gradient(dx); result = x + (h.*dx) + (h^2.*dx2)./factorial(2);

6 years ago | 0

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How to find the distances between two points in X-Y plane?
Use euclidean distance d = sqrt( (x2-x1).^2 + (y2-y1).^2 );

6 years ago | 2

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How to make the binarized image clearer
Pay attention that you don't extract colormap This only extracts indexed image (see workspace, I is of size [369x574x1]) I = i...

6 years ago | 0

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Drawing lines like streamslice
Explanations: result See attached script

6 years ago | 0

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I need help with plotting streamlines and velocity field
Use gradient() and streamline()

6 years ago | 0

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How can I intersect a line and a 3D object (cube, sphere, prism)?
It is a pyramid. If you want to know if line intersects pyramid you should inspect each plane of it Once you have all interse...

6 years ago | 0

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Full fill a rectangle shape in an image
Use convhull or boundary to get contour of your figure Then use inpolygon to fill this shape

6 years ago | 0

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Do the isosurfaces merely indicate a single value or do they contain information on all the value above the threshold?
You should plot multiple isosurfaces since isovalue should be a scalar YOu can use for loop for that purpose

6 years ago | 1

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How to color the area between lines that are vectors, no functions
I created some figure and lines I rotated lines and created new figure (yellow) Painted faces to white and removed edg...

6 years ago | 0

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Setting the distance between 2 lines?
What about for loop? width = 10; dist = 10; x0 = 0; hold on for i = 1:4 xline(x0+(width+dist)*i,'Linewidth',width) en...

6 years ago | 0

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color intensity showing z values
You should use griddata() and pcolor()

6 years ago | 0

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How can I Write a program that determines how many real roots are expected out of the quadratic equation (ax2 + bx+ c = 0) with corresponding inputs. When a user runs the file it should ask for the values of the constants a, b, and c.
I made a printscreen for you From this page: LINK Look carefully on your if statement

6 years ago | 0