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Les Beckham


Last seen: Today 2013 以来アクティブ

Many years developing flight control algorithms and software

Programming Languages:
C++, C, C#, MATLAB, Assembly
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Rounding towards zero or from zero
There is no tie involved in rounding 3.6. If you wish, you can use floor instead: floor(3.6) If x was 3.5 instead, that would...

2日 前 | 0

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Is it possible to have a file that changes it name depending on another variable?
Try this: % Button pushed function: SaveButton function SaveButtonPushed(app, event) PatientID = app.PatientI...

15日 前 | 1

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Condense code in Split string operation
If you put the filename in a string instead of a char vector you can do it in one line s = "xxx_yyy_zzz.xlsx" extractBetween(s...

15日 前 | 1

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increasing amplitude of sine wave
Fs = 44100; dt = 1/Fs; StopTime = 3; t = (0:dt:StopTime-dt)'; Fc = 3000; A = linspace(0, 1, numel(t))'; y = A.*sin(2*pi*Fc...

27日 前 | 0

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How to search for previous values in a table?
This should do what you want. Note that the cell array in this case only has one cell because there are only two timestamp rows...

28日 前 | 0

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Match two variables list
Perhaps what you want is this: c = ["80ms,110ms", "110ms,140ms", "140ms,195ms", "195ms,250ms", "250ms,400ms", "400ms,550ms", "5...

約1ヶ月 前 | 0

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Formatting a vector to not include the first value
It seems like you could benefit from taking this introduction to using Matlab: Matlab onramp This is an example of very basic ...

約1ヶ月 前 | 0

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Using plot handle to replot a graph
Read the documentation for the copyobj function. Here is an example: x = 0:0.1:10; y = [sin(x);cos(x);tan(x)]; for i = 1:3; ...

約2ヶ月 前 | 1

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how do I swap both axes in the current plot
syms y U = y^2/2 - (3*y)/4; yrange = [0,1]; fp = fplot(U,yrange); plot(fp.YData,fp.XData) grid on

約2ヶ月 前 | 1

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Code to determine a log of the mean for a column of numbers?
A = magic(4) logmean_col1 = log(mean(A(:,1))) max_col2 = max(A(:,2)) mean_col3 = mean(A(:,3)) mean_col4 = mean(A(:,4))

約2ヶ月 前 | 1

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Find unique number sets
A = [1 4; 2 3; 3 2; 1 4]; B = unique(sort(A, 2), 'rows')

約2ヶ月 前 | 0

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Why is Q=30 after the loop is ran?
B=1; Q=0; if B==1 && Q~=B Q=20; if B<0 || Q==20 % you just set Q equal to 20 on the line above so this condition is ...

約2ヶ月 前 | 0

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How to plot the bode plot extracted from LTspice in Matlab?
I used the import tool to import the data as fixed width data (right click on the file in the Current Folder and select Import D...

約2ヶ月 前 | 0

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If there is a coding "sqrt(sum(data(:,1:end).^2,2))" , so what is the function number 2 after comma?
That tells the sum() function to sum along the rows. See the documentation for sum here

約2ヶ月 前 | 1

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Extracting data from a matlab figure and saving it as a .mat file
open('6000_1.fig') hl = findobj(gca, 'Type', 'line'); % find the lines x = get(hl, 'Xdata'); % extract the data y = get(hl, '...

約2ヶ月 前 | 1

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Filling gaps in a vector using a secondary data set
rain1 = [nan nan 1:10 nan nan] % example data rain2 = [20:34] idx = isnan(rain1); % find where rain1 has nans rain1(idx) = ra...

約2ヶ月 前 | 0

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Guessing the values of a function by using initial values
You don't have to "guess" the values of the function, you can just calculate them. Example x = [-20:.1:20]; y = x; [X,Y] = m...

約2ヶ月 前 | 0

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Replacing Values in Matrix that are not equal to 1 while excluding 'NaN'
test1 = [ NaN 2 9 2 -.23 NaN 3 2 -1 -1 NaN 6 -.4 -1 -.57 NaN] test2 ...

約2ヶ月 前 | 0

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Concatenating Edit Field value with an existing string in App Designer
First, if you are getting an error, that is usually what will help you (and us) figure out what is wrong so, please, post the co...

約2ヶ月 前 | 0

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How to tick the parameter in the plot of a parametric function?
Try this (or something similar): % Your original code t = linspace(0, 1, 1000); x = t.^2; y = t.^3; figure plot(x, y, '-'...

2ヶ月 前 | 1

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Two easy questions (But I am confused)
Using smaller examples so we can see the results: S = magic(10) % sample matrix d = diag(S) % extract the diagonal elements %...

2ヶ月 前 | 0

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How to plot a 3-D "hotspot" figure
I would suggest looking at this example for the scatter3 function: scatter3 with varying marker colors You could use your f(x, ...

2ヶ月 前 | 1

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How do I demagnify a help page?
Ctrl-Scroll Down will reduce the magnification

2ヶ月 前 | 0

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How can I programmatically open the results of a command in a new window without setting it to a variable?
I can only think of a way to do this in two steps rather than one. result = 2 + 2; openvar('result'); This should work in des...

2ヶ月 前 | 1

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Efficient Way to find index of max column for each row
Are you wanting to find the column number of the maximum value in each row? If so, this is how you can do that: A = magic(5) %...

3ヶ月 前 | 0

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Too many output arguments (five on output)
You are defining this function as a function that takes 5 input arguments and returns one output argument. function y_cubic=cub...

3ヶ月 前 | 0

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Strange result in subtraction operation
The "obvious" result is 1.2e-14 not 1.12e-14 (the different last two digits in your original numbers at the 14 decimal place giv...

3ヶ月 前 | 0

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Removing quotation marks in a string using for loop
The quotation marks are not actually part of the string. It is just displayed that way. Plus, since you are using strings inst...

3ヶ月 前 | 0

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What is this center line when I create m file from mlx file?
I believe that what you are seeing (if you are viewing these in the Matlab editor) is the "Right-hand text limit" line. You can...

3ヶ月 前 | 0

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How to Extract 2048 values containing the maximum value?
Note that this plots the group that contains the maximum datapoint in all of the data. It does not "plot the largest 2048 value...

3ヶ月 前 | 1

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