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# Harry MacDowel

30 total contributions since 2011

“Computers are useless. They can only give you answers.”
(Pablo Picasso)
Professional Interests: data processing

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When using fopen, what's the difference when we include/exclude 'w' in the second half of the parenthesis?
The 'w' simply means write. So if the file 'exp.txt' does not exist, that command will create exactly the file, and allows yo...

plus de 7 ans ago | 0

what is wrong with fprintf
Try this fprintf('the first number is %0.1f and the second is %0.1f\n',a,b)

plus de 9 ans ago | 0

Question

Pan a Plotted Curve with a Stationary Plot Behind
figure; X = rand(100,1); Y = rand(100,1); plot(X,Y); hold on; plot(X,sin(Y)); I want to be able to pan t...

plus de 9 ans ago | 1 answer | 0

### 1

trend line calculation and display
First, plot the data like usual. Then go to Tools -> Basic Fitting Choose one of the fittings you like, then check Show ...

plus de 9 ans ago | 4

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how ro rename matrix
newmatrixname = matrix1;

plus de 9 ans ago | 0

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How do I change the Matlab Desktop font preferences using commands?
You know what, Yair, I bet you gonna love this extraordinary File Exchange function called cprintf Check it out here:- ...

plus de 9 ans ago | 0

While loop homework problem
I felt a bit bored so I do the coding for you. Also I might have use for this in near future. Just run arcCosSin in command wind...

plus de 9 ans ago | 0

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how would i make this tricky switch case
help switch

plus de 9 ans ago | 0

Display Log scale on y axis of graph
A log scale but not the log of your data, that is exactly what semilogy is doing. In fact I think you are not stating your prob...

plus de 9 ans ago | 0

Somehow the 2nd X-Axis is not what it seems
Anyway I tried several more methods including those suggested by Walter. My conclusion of solving this problem is as follows:...

plus de 9 ans ago | 0

The music you listen to when you're Matlab-ing?
Interesting stuff you got there, Walter! For me it is some fast-paced hip hop songs like Eminem's "Lose Yourself" to wake me up...

plus de 9 ans ago | 0

Somehow the 2nd X-Axis is not what it seems
The following code before the figure is plotted solve the apparent bug:- set(figurehnd,'position',[1 47 1440 786]); ...

plus de 9 ans ago | 0

Question

Somehow the 2nd X-Axis is not what it seems
I am plotting a 2nd y-axis to my existing codes without any data on it so I am actually 'converting' from one to the other, as b...

plus de 9 ans ago | 3 answers | 0

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Question

The music you listen to when you're Matlab-ing?
Hie all, I am always interested in what kind of music that gives you the kick when you're programming. You can be a little spec...

plus de 9 ans ago | 6 answers | 0

### 6

Regarding calling of matrix outside for loop
Combined = [] for i=1:1:4 Mat = rand(2); Combined = [Combined;Mat]; end

plus de 9 ans ago | 0

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finding number of a column in a cell (column that contains a specified string)
find(char(CELL)=='a') Does that help?

plus de 9 ans ago | 1

burst duration
I do not know what do you mean by consecutive values. You mean 1,2,3,4,5,6,7... consecutive? Or 1,1,1,1,1,1,1.. consecutive? ...

plus de 9 ans ago | 0

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It works like this:- P.variable = rand(20,1); x = [4 5 6 9]; for ii=1:4 P.variable(x(ii)) = ii; end ...

plus de 9 ans ago | 0

Why don't you use textread or textscan or fscanf? doc textread doc textscan doc fscanf You can control the type ...

plus de 9 ans ago | 0

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Axis date values disappear when datetick is applied to a simple time-series plot
I feel your pain. I used to deal with date on x-axis and it is really a huge, huge pain. I suggest you go to File Exchange and ...

plus de 9 ans ago | 1

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cropping satellite image (RGB image)
Unhas, To save the image in high quality, look for the print function doc print You can even set PaperPositionMode....

plus de 9 ans ago | 0

find peaks
Sometimes identifying the noise would be a good start. Try Allan Variance method. Good luck!

plus de 9 ans ago | 0

is it possible aarays in first row and first column of a cell be writen in red or other color?
I think that has something to do with the display of the data rather than the content of the data. What I know is, in GUI, yo...

plus de 9 ans ago | 0

Question

I am new to Simulink although I'd been using Matlab for a long time. I am planning to use the Simhydraulic package. I have tw...

plus de 9 ans ago | 1 answer | 0

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GUI Button with keyboard shortcut
Yes you can, Jan. If you want to do that, you can define the KeyPressFcn by passing the input into a function you created you...

presque 10 ans ago | 0

Pushbutton in GUI
I do not know whether you refer to the variables which are executed in pushbutton1 to pass it to pushbutton2 or you want to know...

presque 10 ans ago | 0

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Find similarity between string inputs
The function strcmp is a good start for you to study:- <http://www.mathworks.com/help/techdoc/ref/strcmp.html>

presque 10 ans ago | 0

You want to try fscanf. The documentation: <http://www.mathworks.com/help/techdoc/ref/fscanf.html> One of the examples:- ...

presque 10 ans ago | 1