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# Ameer Hamza

### Hong Kong Polytechnic University

2.540 total contributions since 2016

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how can i normalize a plot
divide by signals by maximum value of EtRe. Something like this max_EtRe = max(Etre); EtRe_ = EtRe/max_EtRe; Etlm_ = Etlm/max...

etwa 2 Stunden ago | 0

Why legend something wrong
No need to call loglog and scatter seperately. loglog() can do both % clear;clc;close all; h = [0.05 0.025 0.0125 0.00625 0...

etwa 3 Stunden ago | 0

How can I write a function that replaces all of the multiples of eight or nine in a vector with seven, unless the multiple of eight or nine is also a multiple of seven.
Something like this x = 1:1000; mul7 = mod(x, 7)==0; mul8 = mod(x, 8)==0; mul9 = mod(x, 9)==0; mask = (mul8 | mul9) & (~m...

etwa 6 Stunden ago | 0

How can I save the final output in a matrix without manually save it on the image panel using patch?
Use getframe() to get the graphics as an image matrix x=[0 10 5]; y=[0 0 8.66]; patch(x,y,'white') set(gca,'Color','k','xti...

etwa 6 Stunden ago | 0

Evaluate definite integral numerically, where the function is indeterminate
If you have Symbolic toolbox, then you can try syms x Phi = 1; f(x) = x.*cosh(x)./( sinh(x).*(cosh(Phi*x)).^2 ); y = vpain...

etwa 6 Stunden ago | 1

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How to have a surf plot displayed in a GUI (not as an external figure).
You need to pass app.UIAxes to all the other functions too. Otherwise, they will also create a new figure window. surf(app.UIAx...

etwa 6 Stunden ago | 0

How to show the color changing while comparing with grid size
You can use rescale() function. Change the contourf() line to this contourf(x,y,rescale(phi.', 0, 1));

etwa 6 Stunden ago | 0

creating a function that reads into the directory
you also need to use dir() to get actual file names. Try this code % FilePrefix ='DynamicData'; FilePrefix ='test'; Directory...

etwa 7 Stunden ago | 0

Plotting two random vector
816 to 832 makes up 17 elements. So I guess the range should be 817 to 832. If the data is available in Table datatype, then you...

etwa 7 Stunden ago | 0

is it possible to use cell array to define Lb and Ub of genetic algorithm in Optimization Toolbox
Define lb and ub as simple vectors. For example nvars = 18; lb = zeros(1, nvars); ub = ones(1, nvars) Also you need to pass ...

etwa 7 Stunden ago | 0

tout (time) is not working
tout is only created after the simulation is complete. Therefore, you cannot use it as an input to gain. It seems that you want ...

etwa 9 Stunden ago | 0

How can I call sub-functions in the Main function
I haven't used MATLAB grader, but you should be able to call them like normal MATLAB functions. function main % name of main fu...

etwa 9 Stunden ago | 0

Set interval for colorbar
Try this intervals = 0:0.1:1; clrs = bone(2*numel(intervals)-2); colormap(clrs); colorbar

etwa 9 Stunden ago | 0

ODE symbolic Boundary conditions in respect to another variable
You are correct. The equation is displayed incorrectly. It seems like a bug. However, it seems that this bug only affects the di...

etwa 10 Stunden ago | 0

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Can't plot all the four points among the inputs given in an OR Gate.
The way you are using plot() does not make much sense here. Using scatter() with y as the color value will show the difference f...

etwa 11 Stunden ago | 0

Settin spacing between Y-axis
Use daspect() plot(rand(1,10)*10); daspect([1 5 1]) % 1 unit of x-axis is equal to 5 units of y-axis Alternatively, try plot...

etwa 11 Stunden ago | 1

How can one show variable values in legend of a plot?
Run this example T = 1:3; Legends = compose('Temp is %d', T); hold on; plot(rand(1,10)); plot(rand(1,10)); plot(rand(1,1...

etwa 13 Stunden ago | 0

How to take and integral of a matrix
You can integrate a constant matrix by simply multiplying it with the length of the interval. M = [1 2]; M_int = M*(12-0) How...

etwa 13 Stunden ago | 0

Displaying All the Related Items from an Input File
Try this str = fileread('test.txt'); str_words = cellfun(@(x) {strsplit(x, ' ')}, strsplit(str, '\n')); str_words = [vertca...

etwa 14 Stunden ago | 0

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Plotting multiple probability distribution plots in succession
Something like this M = rand(24, 200); % your matrix figure; for i=1:size(M,1) x = M(i, :); subplot(6, 4, i); ...

etwa 14 Stunden ago | 0

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Subs function does not work on symbolic expressions and functions
You are overwriting the symbolic variable 'm' with numeric value on line m = solve(norm([5/m, 3/m, 0]) == 4.32, m); and after...

etwa 14 Stunden ago | 0

Removing DC component at 0 HZ from acceleration data after fft
As described here: http://blog.originlab.com/how-to-remove-dc-offset-before-performing-fft try using a high-pass filter to remov...

etwa 14 Stunden ago | 0

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How to capitalize words in a string (matlab)
"strrep() function is banned here". What about regexprep in = 'Hello Mello Jello Mello Hello'; out = regexprep(in, {'hello', '...

etwa 14 Stunden ago | 0

How to plot with diferents colors
By default, the MATLAB axes only use seven colors to plot the lines. After that, the sequence is repeated if there are more then...

etwa 14 Stunden ago | 0

Giving names to cells
Use iscell() function if ~iscell(output{i}) Also, note that save() will not accept indexing like this 'output{i}'. You will ne...

etwa 14 Stunden ago | 0

Timeseries Plot Between a certain time interval
See the attached file (saved in R2020a) for one of the possible ways. It uses the MATLAB function block.

etwa 15 Stunden ago | 0

resistor with random variable number not working
There is no need to add randn(1) in the resistor value. As the documentation page mentions: https://www.mathworks.com/help/simrf...

etwa 15 Stunden ago | 0

Problems in solve iteratively calculation
If you look at the graph of this equation, you can see that it has two solutions in the interval [0 1]. syms dt2; f = (-2.4638...

etwa 15 Stunden ago | 0

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