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How know the size of matrix after delete raws
_"I want to delete all rows that start with an element greater than 5 in the matrix"_ In Matlab, use "logical addressing" for...

約8年前 | 1

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How do I crop white space from datetime plots ?
xlim([datetime(yL,mL,dL) datetime(yR,mR,dR)]) where yX,mX,dX are year/month/date for Left/Right axes limits desired. _Pres...

約8年前 | 0

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how to read data and put them into separate line?
In that case (known record length) >> L=23; % define record length >> fmt=repmat('%c',1,L); % format...

約8年前 | 0

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How to store value in a two dimentinal array in matlab
Every time you execute B = cell(size(e)); you create a new empty cell array of size(e) empty matrices so for every loop...

約8年前 | 0

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How can I get data computed inside of a function to my work space to use?
Anything you want to can be returned as one or more output arguments either as individual variables or arrays or any other highe...

約8年前 | 0

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Using a for loop, how do i make an array where the first column is the x value & the second column is the y value when extracting the x & y values from a larger, non-square matrix? I want every 20th value of x and y starting at 10 for both of them.
z=x(10:20:end,10:20:end);

約8年前 | 0

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Matlab text file opts varying for similar files
The difference is that the second file has the UND indicator in the first data line whereas the first file has a completed recor...

約8年前 | 1

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Import data based on markers in Excel.
Read the text data from the spreadsheet in column A and locate the two fields, then reread with the specified range thus compute...

約8年前 | 0

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Reading a generic text file with string and number
line1 = textscan(fid, '%s%s%s%f%f%f%f%f%f%s%f%s\r\n','HeaderLines',41); >> fmt='%s%s%s%f%f%f%f%f%f%s%f%s' fmt = '...

約8年前 | 0

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Plotting equation with specific input range
fnF=@(x) min(1,2*x./(x+5)); x=1:10; plot(x,fnF(x))

約8年前 | 0

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How can I create a vector of markers for a scatter plot
... c=[102, 215, 209;253,174,97;215,25,28]/255; m=['o','d','s']; figure, hold on for i=1:size(x,2) scatter (x...

約8年前 | 0

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Write a function called fare that computes the bus fare one must pay in a given city based on the distance travelled. Here is how the fare is calculated: the first mile is $2. Each additional mile up to a total trip distance of 10 miles is 25 cents.
function a = fare(dist,age) ... fare=2; ... Unlike Fortran, the return value in a Matlab function is not stored in t...

約8年前 | 0

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Hi - Please why I don't get the excat amplitude in the spectrum of two added sine waves xt= 0.7*sin(2*pi*50*t)+sin(2*pi*120*t) , I mean i don't get excatly 0.7 for 50 Hz - nor excatly 1 for 120 Hz
To amplify on Ameer's answer... >> [p, fr]=findpeaks(a,f,'minpeakheight',0.25) p = 0.6097 0.9503 fr = 49.8047...

約8年前 | 5

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Using errorbar for multi-column datasets without loop
I get the same error if I try to use a single error value for all _y_ regardless of number of columns; I thought previous versio...

約8年前 | 0

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How to speed up my code
Not surprising replacing with |max| increased run time...see if the following produces same result/makes any significant timing ...

約8年前 | 0

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Cannot get textscan() while loop to work
Format string is in error; the last numeric value on each record is floating point. fmt=['%s%s' repmat('%f',1,3)]; % text...

約8年前 | 0

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Finding the First Dates of each Month
If the sample dates are what your data file has for the first data in the respective month and year, it appears the data are inc...

約8年前 | 0

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Opening files with for loop, switches to parent directory
I'm thinking the code shown doesn't have such a symptom; the content of the variable |file| will be that of |files| as there is ...

約8年前 | 0

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Optimizing indirect mapping: From matrix elements to vector values
OK, with the additional information, remove the 2D nature and use |interp1| function density = get_density(x, Density, Grid...

約8年前 | 0

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How to plot temporal changes in batches of data?
t=readtable('crowe.csv'); t.SSID=categorical(t.SSID); t.Time=datetime(t.Time); figure,hold on [g,ids]=findgroups(t...

約8年前 | 1

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How can I shade an area of my graph between two vertical lines?
iz=linspace(20,24,40); yz=pdf(pd,iz); area(iz,yz) <</matlabcentral/answers/uploaded_files/121187/untitled.jpg>>

約8年前 | 2

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bar graph command for range values
if numtests > 1 figure1 = figure('Color',[1 1 1]); subplot(141); bar(ampsCAP(1,:)); title([int2str(Cs(1,1)) ' Hz']);...

約8年前 | 0

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How can i extract for specific set of rows from large set of data to find statistical operations. And set was incremented by 1 for each set of rows and create a columns for each feature extraction in machine learning!
_"... 1000*1. Here, would like to find for each 10 rows"_ N=10; % size of groups L=size(x,1); ...

約8年前 | 0

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Subscript indices must either be real positive integers or logicals.
... normalize8=uint8(normalize); X1=normalize8(X)+0.01; %for the log operation ... You defined |normalize| as a fl...

約8年前 | 0

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Adding duration in second as x axis
Don't alias the builtin |duration|; that _will_ create problems working with time objects. You don't really want a duration, ...

約8年前 | 0

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how to create multiple axis at x axis on same time window? i have attached one image of that kind. Please help.
Start with |subplot| and mung on it a little... hSp(1)=subplot(3,1,1); % two subplots in space for th...

約8年前 | 0

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Adding more than one greater/less than condition to an 'if statement'
|inpolygon| can do it but you've then got to return both output variables and do the set difference between _in_ and _on_ to get...

約8年前 | 0

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How to continue running a script using a saved workspace
You'll have to fix your script such that you don't reallocate data arrays when restarting with a changed lower index of the |for...

約8年前 | 0

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Bug on polyfit output?
"Feature" or "Quality of Implementation" depending on your viewpoint... help polyfit ... [p,S,mu] = polyfit(x,y,n...

約8年前 | 2

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How to find average of each column in every matrix within a cell
mn=cellfun(@mean,c,'uniform',0); % c is the cell array |mean| operates by column by default.

約8年前 | 0

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