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How to detect the black line from a captured image?
If you print it out and make a photo, then black is not pure black any more but some kind of grayish or with some kind of color ...

mer än 4 år ago | 0

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plot Datetime on x Axes
There are mainly 2 possibilities You can use datetick() to format your x axis ticks to date or time values You can define your...

mer än 4 år ago | 0

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Run a script for all subfolders
You can use the asterisk (*) as wildcard to generate a file pattern and the dir command to get a struct of all the matching file...

mer än 4 år ago | 1

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How to write this matlab code?
In Matlab, you could write something like B = rand(8760, 30); % matrix B of size 8760x30 with random values P = rand(30, 1); %...

mer än 4 år ago | 0

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Help!!! How to browse text file data to another function
It seems that you access the value of the button, which is not what you intend to do. What you probably want to do is to share d...

mer än 4 år ago | 0

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i want to generate a sequence of n numbers
You can create sequences with the colon operator (:), for exapmle v = [4:2:100]; creates v = [4, 6, 8, ... , 100] with values ...

mer än 4 år ago | 1

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Plots combining into one
In line 32 of your code there is a (second) "hold on" which acts on the active axes. If you want to have two figures with one ax...

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Extracting Data from Tall Arrays using Logical Indexing
I think you mentioned everything that you need for this task. Try this as a starting point: clearvars, close all clc % some...

mer än 4 år ago | 0

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what does this line mean
ones(r, c) creates an array of ones with r rows and c columns. That said, ones(1, c) creates a line vector with c elements. Her...

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I have a set of nonlinear equations (run by rk4 method). How can I compute the Jacobian for those?
Assume you have the set of nonlinear eqations and the vector of independent variables defined in Matlab, then you can use the j...

mer än 4 år ago | 0

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Write value to gauge in MATLAB design app
In the inspector, look for the label of the gauge. Originally it is labeled as "Gauge". You also see this on the code page insid...

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Get every possible combination of an array
This could be a starting point: clearvars, close all clc arr = [-1 1 -1 1 1 1 1 1 -1]; num_arr_elements = numel(arr); ...

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how process sequence of the images in a loop without overwriting
Have a look at your first for loop. Here you are generating a char called fileName which is overwritten in every loop count. fur...

mer än 4 år ago | 0

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Deleted on request by my prof. Sorry
I assume that In your code line 28 it should be t(j) and t(j-1) instead of t(n) and t(n-1) respectively. Then your code at least...

mer än 4 år ago | 0

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Data loading in MATLAB
Hi, have a look at uigetfile and uiopen which open a file selection dialog box. This should solve your issues. Regards, Benni...

nästan 5 år ago | 0

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How to plot data from different folders
You can get the file information (name, folder, date, ...) of files within subfolders using the dir command and wildcards. e.g. ...

mer än 6 år ago | 1

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How to use a double index with a restriction under a for loop along with indicator function to calculate the occurrence of a given state
Sorry, i do not understand your condition and explanation for "if abs (x(i)- x(i-j))= j then S(x)=1". x is a vector. Do you want...

mer än 6 år ago | 0

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Z must be a matrix, not a scalar or vector
You calculate Z (or Q2) using variables that you do not provide us. so it is not possible to give an adequate answer. Is Q2 a ma...

mer än 6 år ago | 0

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Moving average on window of latest inputs with Exponential Weighting method
One possibility is to use the discrete filter block with denominater = [1] and Numerator are the exponential weights. If you do ...

mer än 6 år ago | 0

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how i can use nntool with a scipt
Use nnstart instead of nntool ("nntool is no longer recommended"). Within nnstart you can choose your tool (nftool, nprtool, ...

mer än 6 år ago | 0

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How can I define these on matlab?
When f is a function, then you can not "define" something like f(low) = ... because the stuff in brackets is passed to t...

mer än 6 år ago | 0

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Use of loops to print the contents of a cell array with varying number of rows
Use a struct array instead of cell array and then disp inside an arrayfun: clearvars close all clc system(1).Title ...

mer än 6 år ago | 0

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Deriving the time-domain response of an equation, from a tf
Try <https://de.mathworks.com/help/symbolic/ilaplace.html ilaplace>. Before that you have to convert the tf object to sym object...

mer än 6 år ago | 1

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I don't get the answer that i want?
What is the purpose of your code? You prompt for iii (3xi) and loop through iiii (4xi); Within the loops nothing changes, right?...

mer än 6 år ago | 0

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Is there a script function or variable to determine if running on desktop?
From the documentation: USED = desktop('-inuse') % returns whether or not the Desktop is currently in use. It does not sta...

mer än 6 år ago | 1

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Im ploting a graph where my x axis is in time format. How do I adjust the intervals of the x axis to be 15 minutes? Start at 00:00:00 ending at 23:45:00
You can get the char array containing your requested date values by charArray = datestr(0:minutes(15):hours(23.75),'HH:MM:ss...

mer än 6 år ago | 0

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How to make a softer plot using a moving average every ''x'' skips?
If you have signal processing toolbox than you can use moving average filter or more advanced filtering techniques as described ...

mer än 6 år ago | 0

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How to concatenate variables from the workspace with a constant part in their name?
You can use the cell returned by the who command and pass it to the "eval" function to get the values of the variables. You coul...

mer än 6 år ago | 0

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saving all figures as jpeg file on harddrive
Collect all the figure handles in a figure handle array, e.g. f(ii) = figure; and then work with arrayfun on the saveas command...

mer än 6 år ago | 0

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I want to find particular values of t at which y becomes 2 (by writing some commands in code itself). Can I extract such values of t as a vector?
You could rewrite your function so that your wanted data points are maxima and search them with findpeaks. [~,locs] = findp...

mer än 6 år ago | 0