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Ameer Hamza


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Hong Kong Polytechnic University

3.101 total contributions since 2016

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Answered
Why F vs T graph are not plotted , it shows only blank figure and how i can get all the values of F and T in the workspace as it shows only last value.
You are not specifying the marker type in plot() and also you are not saving vaues of F at each iteration c1 = 27.742*10.^8; c...

alrededor de 1 hora ago | 0

| accepted

Answered
i want to write code for a question
Although this equation is linear is x, and you can write the equation of x. For a general case, you can use fsolve() c = 0.0038...

alrededor de 2 horas ago | 0

| accepted

Answered
tf function doesn't work
You need to have the control system toolbox: https://www.mathworks.com/help/control/index.html for using tf() function. It seems...

alrededor de 13 horas ago | 0

Answered
How can I assign a number to another number and then create sequences in which I can swap them at will?
Check this code numbers=1:40; numbers_b=[11:14, 21:24, 31:34, 41:44, 51:54, 61:64, 71:74, 81:84, 91:94, 101:104]; assigned=[n...

alrededor de 14 horas ago | 0

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Answered
Integrate planck function between two intervals
Check this code and compare it with your code to see the mistakes. c1 = 27.742*10.^8; c2 = 1.43878*10.^4; sigma = 5.67*10.^-8...

alrededor de 14 horas ago | 0

| accepted

Answered
Plotting coordinate points using plot()
It is giving you points, but the size is so small that they are barely visible. Also, transpose is not needed here. The followin...

alrededor de 15 horas ago | 0

Answered
Help.. how would i get 7* to 1*
You can run the for-loop in reverse order too N = 7; for mm = N:-1:1 % equivalent to mm = flip(1:N) for nn = 1:mm ...

alrededor de 15 horas ago | 0

| accepted

Answered
2d to 3d array conversion
First convert tables to arrays and then use cat() for i=1:14641 a{i} = readtable(strcat('output_',num2str(i),'.csv')); end a...

alrededor de 15 horas ago | 0

Answered
VolumeViewer ScaleFactors not working in R2018b
ScaleFactor was not present in R2018b: https://www.mathworks.com/help/releases/R2018b/images/ref/volumeviewer-app.html?searchHig...

alrededor de 17 horas ago | 0

Answered
expanding a given function as a power series?
You need the symbolic toolbox for this problem! syms x y f(x) = x^3+2*x; g = f(exp(y)); g_approx = taylor(g, y, 'Order', 1...

alrededor de 19 horas ago | 1

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Answered
how to get data from an interval
You can use logical indexing. Add these lines at the end of your code x = sol.x; y = sol.y; idx = (x > 50) & (x < 180); fi...

alrededor de 20 horas ago | 0

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Answered
How can I change the linewidth in a pzmap?
This is one way fig = figure(); ax = axes(); s = tf('s'); G=s+3/((s+4)*(s^2+1)); pzmap(ax, G); l_zero = findall(ax, 'tag...

alrededor de 20 horas ago | 1

Answered
Count using mod function
The following example show how to find the even number in a vector using mod(). You can extend it to other cases x = [1 4 3 2 1...

alrededor de 21 horas ago | 0

Answered
Additive White Gaussian Noise
You can generate the sine wave using sin() function: https://www.mathworks.com/help/matlab/ref/sin.html. Note that you can get a...

alrededor de 21 horas ago | 0

Answered
Averaging oscillating data points
Try lowpass filter if you have signal processing toolbox data = readmatrix('SampleTempData.xlsx'); t = data(:,1); x = data(...

alrededor de 21 horas ago | 1

Answered
My Colored image gets read as a bw image
MATLAB is loading it as an indexed image: https://www.mathworks.com/help/images/image-types-in-the-toolbox.html#f14-17587. The f...

alrededor de 22 horas ago | 0

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Answered
syntax of matlab code
You can write-click on the name of the function and click open "Function name". It will take you to the corresponding function u...

1 día ago | 0

Answered
Entering Data to plot Graphs
Just entering as an array would be fine. See plot(): https://www.mathworks.com/help/matlab/ref/plot.html. Here is a very simple ...

1 día ago | 0

Answered
How can I coding this function correctly?
Since this is a homework question so I won't be giving exact code, but you can read the documentation of the following functions...

1 día ago | 0

Answered
How to make a text figure close after an input command, how do I also make a text figure show up after an input command
You can use close() x = {'Choose the number you would like to solve'; '1 = Kinetic Energy';'2 = Potential Energy';'3 = Net Forc...

1 día ago | 0

Answered
The Eigenvalues of a large matrix don't cross each other when plotted
Yes, this is a very common problem with MATLAB's eig function, and John has created this excellent package to solve this problem...

1 día ago | 0

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Answered
perform matrix operation without for loop
Following code is equivalent xe = zeros([size(exp_data) numel(beta)]); mask = exp_data > 1.5; for m = 1:numel(beta) xes ...

1 día ago | 0

Answered
Can someone help me write a code to generate a random matrix like the one in the picture?
See blkdiag(): https://www.mathworks.com/help/matlab/ref/blkdiag.html. It is made specifically for this purpose. For example d ...

1 día ago | 1

| accepted

Answered
Set facecolor in app designer
No need to pass app.UIAxes in these lines set(pie(1),'facecolor',[255 85 180]./255); set(pie(2),'facecolor',[255 0 0]./255);

1 día ago | 0

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Answered
Calculating seasonal mean of precipitation from 25 years daily data
See retime(): https://www.mathworks.com/help/matlab/ref/timetable.retime.html

1 día ago | 0

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Answered
Diagonal slices of 3D array
The question is not entirely clear, so the following is my guess, but such a problem can be solved using sub2ind(). C = % 2N*N*...

1 día ago | 1

Answered
Ues waitforbuttonpress for key press only
Instead of waitforbuttonpress, use KeyPress callback for the figure object: https://www.mathworks.com/help/matlab/ref/matlab.ui....

1 día ago | 0

Answered
Direction between points from [0,360]
Add 2pi to negative values. x = -1; y = -1; theta = atan2(y, x); if theta < 0 theta = theta + 2*pi; end

1 día ago | 0

Answered
How can I crop several regions from a video and plot all the signals of rgb values in the same graph?
Check this code vid = VideoReader('respiration.mp4'); I = cell(1, 3); rects = zeros(3, 4); numFrames = vid.NumFrames; % go...

1 día ago | 0

| accepted

Answered
Change filename of all files in folder to have underscore instead of space
Something like this d = uigetdir(pwd, 'Select a folder'); files = dir(fullfile(d, '*.s2p')); for i = 1:numel(files) or...

1 día ago | 0

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