Les Beckham

Last seen: Today | Attivo dal 2013

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Many years developing flight control algorithms and software

Programming Languages:
C++, C, C#, MATLAB, Assembly

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How do I get old "property inspector" popup window in figure?
Try clicking the button at the far left below the window title bar (it shows "Group View" when you hover over it). It looks like...

18 giorni fa | 1

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Detect monotonic decrease and record the corresponding rate
Your "for example" text doesn't seem to match with finding how long it takes to decrease from 25 to 15. So for example, I would...

21 giorni fa | 0

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cant call function from a file
It would have been better if you had posted your code as code (text) rather than a picture, then we could have modified it and r...

circa un mese fa | 1

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How to I parse an array of time stamp strings read into a table form a CSV file?
Don't operate on the timestamps as strings, use the datetime and duration types and the associated functions. times = linspace(...

circa 2 mesi fa | 1

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List of increasing integers
Are you sure that is what you want? It doesn't seem very useful. dim = [2 2 4 2 2 2 2 2 2 2 2 2] int = 1:sum(dim) int(end)

circa 2 mesi fa | 0

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How can I isolate a set of data points on a graph using conditionals?
The data doesn't need to be "linear" to use indexing to select the data that you want. For example: x = 1:10; y = rand(1, 10)...

circa 2 mesi fa | 0

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how to automate this manual code containing if else conditons?
Here is one approach. I eliminated the extraneous parameter ini for this example. I'm not sure I understand the role of the Ti...

2 mesi fa | 1

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How to modify the slopes of the sawtooth wave?
It doesn't really make sense to me to talk about angles when referring to a time history of a signal. If you were to plot the s...

2 mesi fa | 1

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Interphase - How to bring back default view?
If you are talking about the editor being split into multiple subwindows as shown below, go to the View tab in the tool strip an...

2 mesi fa | 0

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Convert Julian Date + Time in GMT to calendar day + Time in EST
It's not pretty, but it works. yr = '2024'; %<<< renamed to avoid shadowing the year function JDDD = 'J025'; % Julian date GM...

2 mesi fa | 1

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how can i compute Aij?
It appears to work. I ran it for only 2 values of k as it was timing out here in Answers when running with 20 values of k. Wha...

2 mesi fa | 0

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Extract single-digit and double-digit numbers at the same time from a cell array with "regexp"
a={'1','3','6-10','11-20'}; b=regexp(a,'[0-9]+','match'); %<<< add the + to match multiple numeric characters b{:}

2 mesi fa | 1

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How to match mean and standard deviation of 2 datasets for data that cannot be less than 0
Your model data doesn't look at all like the observed data, so I'm not surprised that trying to force their statistics to match ...

2 mesi fa | 0

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confirm valid file identifier before flcose?
If you call fopen on the file identifier when the file is closed it will return empty (instead of returning the filename). So, ...

3 mesi fa | 0

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Why is the error in the attached code?
After adding end to all of the functions so that this would even run, you get an dimension error (see below). You are trying as...

3 mesi fa | 0

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Need for help for performance improvement or refactoring methods on this code
Wow! That code gets weird really fast. First, you haven't posted code that will actually run. You've shown three functions ...

4 mesi fa | 0

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How can I break a long column vector (281820X1) into 140 short column vectors (2013X1)?
Use reshape data = (1:281820)'; cols = 140; rows = numel(data) / cols; data_reshaped = reshape(data, [rows cols]); whos ...

4 mesi fa | 0

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How to include a negative number in initial conditions for Eulers method code?
It is always better to post example code as text rather than a screenshot. Nevertheless... Since the first element of x is -1 ...

4 mesi fa | 0

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Plotting .mat file
That mat file doesn't contain anything interesting to plot. load metro.mat whos AudioInfo

4 mesi fa | 0

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Load .txt file into matrix form
That looks like a good candidate for readmatrix. mtx = readmatrix('X_deg_10.txt'); size(mtx)

4 mesi fa | 0

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what's the index exceed error?
On the second pass through the for k = 1:20 loop, you are trying to access the second row of sig, but it only has one row.

4 mesi fa | 0

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How can I import this data with a for loop?
You were very close. x = [3 5 7 9 11 12 14 15 16 17]; for i = 1:numel(x) fn = sprintf('PendulumTestData/TD%d/IK/HR_1.mot'...

4 mesi fa | 1

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Adding zeros to a column vector to match a larger column vector
new_x= [x; zeros(length(y)-length(x), 1)]; % ^ ^ switch the arguments to zeros % use ...

4 mesi fa | 0

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Plots: aligning categorical y-axis labels
% create dummy data y = [1,2,3]; x = [5,10,20]; err = 0.5*ones(size(y)); % draw plot figure(1) yyaxis right errorbar(x,...

4 mesi fa | 1

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Resolution of plot code errors
Why are you trying to do this with symbolic variables? It works using simple numeric variables. x = linspace(-5, 5, 500); y =...

5 mesi fa | 0

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Issue with delete(obj)
Here are some modifications that should get you closer to what you wan't. Note the comments I've added in the code to point out...

5 mesi fa | 0

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for loop does not iterate
Array indices in Matlab must be positive integers (or logical). You are trying to us xroots, a vector of complex numbers as the...

5 mesi fa | 0

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How to save the result of each loop separately
Perhaps this (using a cell array)? y = [3 4]; for i = 1:length(y) x{i} = zeros(y(i), 2) end

5 mesi fa | 1

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How would I plot this and then achieve minimum and maximum.
x = 0:0.1:15; % y=(x)^3/3-11(x)^2/2+24x << you were missing multiplication operators * % and the powers need to be .^ (element...

5 mesi fa | 0

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Hexadecimal Data Convert to signed int32
The hex2dec function assumes unsigned integer unless you tell it otherwise. You can either typecast the unsigned result to sign...

5 mesi fa | 2

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