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G A


75 total contributions since 2012

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Question


multiplication by 0.5 vs division by 2
I tried the following with two options - matrix and scalar clear; N = 1e7; tic for n = 1:N % a=[n n;n n]/2; a = n/2; b...

2 months ago | 0 answers | 1

0

answers

Question


is it a bug?
The code below (i) does not produce an error message about not matching x and y; it can be explained by implicit expansion in ...

3 months ago | 2 answers | 0

2

answers

Question


which way to call function is better?
I have more than hundred of input parameters in myfunc and I am using the following way to call the function after grouping the ...

3 months ago | 2 answers | 0

2

answers

Answered
GUI: Can't access data from another callback function with handles
G A on 31 Aug 2019 at 8:38 Put the line guidata(hObject, handles); at the end of your function control_browse_button_Callbac...

3 months ago | 0

| accepted

Answered
How can I generate equal visual witdh bars with bar graph and log absciss scale ?
Instead of making the x-scale logarithmic by set(gca, 'xscale','log'), use linear x-scale and log10(Frequency) as X

5 months ago | 0

| accepted

Question


is it a bug?
In the following code, if view(2) or view(0,90) is defined before axis() which is not auto, then a default 3D figure will be plo...

5 months ago | 1 answer | 0

1

answer

Answered
Creating a contour plot of magnitude in 3D
Something like this? a=-1:0.1:1; b=-1:0.1:1; [X,Y]=meshgrid(a,b); Z=X.^2+Y.^2; M=[0.5 1]; hold on grid on surf(X,Y,Z), ...

5 months ago | 1

Question


is it a bug?
str2num('"abc"') ans = "abc"

5 months ago | 1 answer | 0

1

answer

Answered
Not obtaining the right shape with matlab plot
Add a dot ./ in the line: si=atan(sin((N+1).*phi)./(R./r3-cos((N+1).*phi)));

5 months ago | 1

| accepted

Question


how can I do it without using eval
There are quite a few handles of uicontrols and uipanels named h1,h2...hN in my code exported by GUIDE. I want to create structu...

6 months ago | 1 answer | 0

1

answer

Question


Is there the more elegant way to do this?
By trial and error I came to the following solution for choosing in my GUI a colormap and the number of colors to be used for my...

6 months ago | 1 answer | 0

1

answer

Answered
Using Push Button to Export a String to an Edit Textbox (GUI)
set(handles.edit1,'String', Name); % Displaying my string "Name" into my Edit Textbox. Put this line in your pushbutton4_Callb...

6 months ago | 1

| accepted

Question


not documented in Matlab?
Both, ishandle(H) and ishghandle(H), are given in doc with only one input argument possibility, however ishghandle(H,'property...

6 months ago | 0 answers | 0

0

answers

Question


Two fields Tooltip and TooltipString duplicating each other.
I was playing with my GUI exported by GUIDE from fig-file and found that there are two fields in object properties containing th...

7 months ago | 1 answer | 0

1

answer

Answered
3d dimensional surface
v = [-2:0.1:2]; w = [-2:0.1:2]; [X,Y] = meshgrid(v,w); Z = 6*X.^2-4*X.^2.*Y.^2; figure(3); surf(X,Y,Z)

7 months ago | 1

Answered
How to combine plots on subplot?
figure(1) clf subplot(3,1,1) hold on plot(temp1,black1,'ko-'), plot(temp1,white1,'go-'), plot(temp1,pol1,'bo-'), plot(t...

7 months ago | 0

| accepted

Answered
How do I plot from multiple mfile into a same figure
Add "hold on" In your mfile2 anywhere before "plot(xfit,yfit)" : figure(2); %figure 2 hold on

7 months ago | 0

Answered
Low pass filtering in frequency domain
fft(x) usually returns a complex value. X_Mag = abs(fft(x)); - from here you are losing the information about the real and imagi...

7 months ago | 0

Answered
Need help plotting multiple graphs in one UIAxes
Your if-statement is returning only one option. Try the following way: function GraphbButtonPushed(app, event) x =...

7 months ago | 0

| accepted

Answered
I am trying to create a surface plot with nested loops and am getting the error "Z must be a matrix, not a scalar or vector."
Try something like the following (z must be a matrix): for m = 1:10 x(m) = m; for n = 1:10 y(n) = n; ...

8 months ago | 1

| accepted

Question


Is there the more elegant way to do this?
I would like to call arguments of function from a string or cell array. For example, this code works as I want: function te...

6 years ago | 2 answers | 0

2

answers

Question


Why Matlab is not changing the name of the GUI window?
The names of my fig-file and main m-file are, for example, |'Version15.fig'| and |'Version15.m'| , however, after executing thos...

6 years ago | 2 answers | 0

2

answers

Answered
How to use the power operator in xlabel?
xlabel('A*R^{2/3}m^{8/3}')

6 years ago | 3

Answered
How to read complex number from a *.csv file?
https://www.mathworks.co.uk/matlabcentral/newsreader/view_thread/239213 http://smallbusiness.chron.com/read-csv-matlab-50663....

6 years ago | 0

Solved


Swap the first and last columns
Flip the outermost columns of matrix A, so that the first column becomes the last and the last column becomes the first. All oth...

6 years ago

Solved


Column Removal
Remove the nth column from input matrix A and return the resulting matrix in output B. So if A = [1 2 3; 4 5 6]; and ...

6 years ago

Solved


Determine if input is odd
Given the input n, return true if n is odd or false if n is even.

6 years ago

Solved


Add two numbers
Given a and b, return the sum a+b in c.

6 years ago

Solved


Fibonacci sequence
Calculate the nth Fibonacci number. Given n, return f where f = fib(n) and f(1) = 1, f(2) = 1, f(3) = 2, ... Examples: Inpu...

6 years ago

Solved


Select every other element of a vector
Write a function which returns every other element of the vector passed in. That is, it returns the all odd-numbered elements, s...

6 years ago

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