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# darova

##### Last seen: 14 dagen ago
1.453 total contributions since 2019

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Use a different colormap scale for different sections of a matrix
YOu can create your own color matrix [x,y,z] = peaks(30); ix = x.^2 + y.^2 < 2^2; c1 = z*0; c2 = z*0; c1(ix) = 1; c2(~ix) ...

14 dagen ago | 0

Medial axis extraction from a .STL file
An example [x,y,z] = cylinder(10); h = surf(x,y,z); p = surf2patch(h,'triangle'); p.facecolor = 'red'; stlwrite('test',p) ...

15 dagen ago | 0

Solving Population Balance Equation for multiple initial particle dimensions
First of all - timespan 0:1.2 is just [0 1] L=[1.2]; % Pipe Length ranges (m) [Z,N]=ode15s(...

15 dagen ago | 1

how to add titles row wise in the montage ?
What about text function? load mri montage(D, map) text(500,25,'TITLE 1','fontsize',30,'color','yellow','fontweight','bold') ...

15 dagen ago | 0

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Plot in 300 or 600 dpi
Use print x = 0:10; y = sin(x); plot(x,y); print('test','-dpng','-r300')

15 dagen ago | 1

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Plotting dates on the x-axis
Just use datenum a = rand(5,4,3); datenum(a(:,1),a(:,2),a(:,3)) Use sort if needed

15 dagen ago | 0

Solve an equation, for a variable, with prompts?
What about this? function main a = myprompt('Please enter a:'); b = myprompt('the same way b:'); function y = myprompt(s...

15 dagen ago | 0

Looping of more than one first order equations in in function file that can be updated for different value variable parameter
See this example f = @(t,x,a) [x(2); x(1)-a*sin(x(1))]; a = rand(10,1); % parameter cmap = jet(10); for i = 1:length(a)...

15 dagen ago | 0

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How do I print probability distribution object into textbox?
Here pd = makedist('Normal'); sig1 = pd.sigma mu1 = pd.mu

15 dagen ago | 1

solving equations with trigonometric functions
Here is the similar example. Maybe you will be interested , , and length are given. angle is changing Calculate length and...

15 dagen ago | 0

How to get back the values of a curve from its cumulative integral value?
Use diff to find real curve from cumulative trapezoid result

16 dagen ago | 0

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How to convert from surf to plot3 ?
Try meshgrid [X1,Y1] = meshgrid(X,Y); plot3(X1,Y1,Z1) line(X1',Y1',Z1')

16 dagen ago | 1

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How do I create variable vectors with a new value for each iteration of a loop?
Here are some corrections % yp=y0; % you are replacing variable yp with y0 yp(1) = y0; % you need to replace first valu...

16 dagen ago | 0

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Measure distance and angle of object
Here is the algorithm crop the region 1 and find min/max [m,n] = size(step1); [~,x1] = find(step1(:,1:n/2),1,'last'); [~,x2...

16 dagen ago | 0

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how to compute derivative
Only you know initial conditions. Imagine the situation: you are throwing the ball, initial conditions are velocity and angle. O...

16 dagen ago | 1

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Plotting Convergence Graph from Bisection Method
Try this while %condition % code line(iter,erorr,'marker','.') iter = iter + 1; end

16 dagen ago | 0

How to detect a curve (surface roughness) from image?
binarize image first remove noise using bwareaopen use edge remove noise if needed using bwareaopen

17 dagen ago | 1

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Having trouble making a surface plot using data from Excel
Either use triangulation x = rand(20,1); y = rand(20,1); z = rand(20,1); dt = delaunay(x,y); trisurf(dt,x,y,z) Either gr...

17 dagen ago | 0

How can I use the subplot command to plot the root estimates vs iterations and the error vs iterations
Try this figure hold on while %condition % some code subplot(2,1,1) plot(iter,root) subplot(2,1,2) p...

17 dagen ago | 0

Integrating a function with one of the limits a matrix
Why don't just use for loop? integralCalculated = zeros(size(u)); for i = 1:length(u) integralCalculated(i) = integral(@(...

17 dagen ago | 0

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Evaluating polynomial functions to get integer as answer
solve can be used for simple problems. Use fsolve or vpasolve to get numerical results

17 dagen ago | 1

How to calculate area under each peak in plot from sampled data
Here is ax example x = 0:20; y = sin(x); [xc,yc] = polyxpoly(x,y,[0 20],[0 0]); % find '0' points intersections x1 = [x...

18 dagen ago | 0

Triangulation of a domain
Here is ax example of triangulation t = (0:90:270)+45; [x,y] = pol2cart(t*pi/180,1); gd = [2;length(x);x(:);y(:)]; % geomet...

18 dagen ago | 1

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empty figure for a given code
You forgot the dot (element-wise operator) You can simplify your code using for loop a0 = 1; for i = 1:5 a0 = ((a0*K-a...

18 dagen ago | 1

Filling in a spherical triangle
clc,clear t = [0; 45; 45]*pi/180; q = [45; 45; 90]*pi/180; [x,y,z] = sph2cart([t;t(1)],[q;q(1)],1); % convert angl...

18 dagen ago | 0

How to create custom color wheel for velocity data stored as RGB and only using R/G channels?
What about this? [R,G] = ndgrid(0:10:360,0:1); % polar coordinates [X,Y] = pol2cart(R*pi/180,G); % convefrt o cart...

18 dagen ago | 0

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i want to draw a streamline at 45 degree.
clc,clear [t,r] = ndgrid(0:5:45,0:10); % create mesh in polar coordinates [x,y] = pol2cart(t*pi/180,r); % con...

18 dagen ago | 0

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