Richard

Actif depuis 2011

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re-build time series from pwelch after removing peaks in the spectra
I have time series data that is similar to the following: t = 3650; % number of days in ten years t = 1:t; % generate ti...

plus de 10 ans il y a | 1 réponse | 0

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Question

find and store index for consecutive numbers
Consider the following: Jday = datenum('2009-01-01 00:00','yyyy-mm-dd HH:MM'):1:... datenum('2009-12-31 23:00','yyyy...

presque 13 ans il y a | 1 réponse | 0

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Question

add additional parameter to contour plot to generate 3d plot
I have an equation which has 3 unknown variables V, s, and T. I want to produce a contour plot that shows what happens when each...

presque 13 ans il y a | 2 réponses | 0

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Question

replace nan values with the mean of other cell array
Consider the following example: Jday = datenum('2007-01-01 00:00','yyyy-mm-dd HH:MM'):1:... datenum('2009-12-31 23:0...

presque 13 ans il y a | 1 réponse | 0

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Question

introduction to matlab I/O
I have some files that collect high resolution acoustic measurements and I wish to import some of the information into matlab wh...

environ 13 ans il y a | 1 réponse | 0

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Question

solving simple equations in matlab
I have 2 variables: d1 = 1:5; d2 = 6:10; I would like to calculate 'dat', which is given by: dat = d1./(10.*d2);...

environ 13 ans il y a | 3 réponses | 0

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Question

calculate week of year
I have an annual time series where measurements are recorded at hourly intervals: StartDate = '2011-01-01 00:00'; EndDat...

environ 13 ans il y a | 2 réponses | 0

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Question

short time fourier transform
I would like to perform a short time fourier transform (STFT) to a synthetic data series. I can compute the fourier transform by...

environ 13 ans il y a | 3 réponses | 0

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Question

plotting in time domain - update plot
I'm working through an example I saw online concerning vertical motion under gravity. The following code and plot shows the outc...

environ 13 ans il y a | 1 réponse | 0

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Réponse apportée
Why does the first value in loop get overwritten
Try Fi = [0,0.8:0.05:1]; T = 160; NPV_list = NaN(length(Fi),1); for fi = 1:length(Fi); F = Fi(fi); l...

environ 13 ans il y a | 0

Question

difficulties with datetick and subplot dimensions
I have several time series that I am trying to analyse and I am plotting all the series in different subplots and scatter plots....

environ 13 ans il y a | 1 réponse | 0

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Réponse apportée
Hi, I'm trying to figure out why my script is only ploting the last input angle, not regarding any of the loops before it.
Try to put hold after the plot command: plot(x,y); hold on;

environ 13 ans il y a | 0

Réponse apportée
how to omit the the dot and numbers
Not sure yet about cancelling the numbers, but you could omit the dots as follows: tt = {'a','0','.','c','1','.','c','3','....

environ 13 ans il y a | 1

Réponse apportée
Saving outputs in workspace
Maybe use assignin --> <http://www.mathworks.co.uk/help/matlab/ref/assignin.html>

environ 13 ans il y a | 1

| A accepté

Question

replace missing values in a matrix
Consider the following: A = [1,1,1; 2,3,1; nan,3,1; nan,3,nan]; how would I replace the missing val...

environ 13 ans il y a | 2 réponses | 0

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Question

find number of columns on text file
Is it possible to determine the number of columns in a text file prior to importing the data into matlab? I can determine the...

environ 13 ans il y a | 1 réponse | 0

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Réponse apportée
no degree symbol
I dont know if this will help but I use ^{o} so for temperature in degrees C I type xlabel('Temperature ^{o}C');

environ 13 ans il y a | 9

Question

removing a loop from a script
I have a matrix 'd' which represents air temperature at specific heights above the ground and for different days of the year. Ea...

environ 13 ans il y a | 1 réponse | 0

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Question

replacing nan values with the mean of a moving window
From the following: t = transpose(1/24:1/24:40); data1 = 1+(30-1).*rand(length(t),1); Randm = floor(1+(length(t)-1).*...

environ 13 ans il y a | 1 réponse | 0

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Question

extracting values at set intervals from a vector
From the following vector: depth = [0:0.1:20]; How could I create a new vector that had the same data as 'depth' but a v...

environ 13 ans il y a | 1 réponse | 0

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Question

explanation for script containing while loop
I was given a script for reading data from a specific file, and although the script works, I don't understand one section of it,...

environ 13 ans il y a | 1 réponse | 0

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Question

gain information from a .cnv file
I have some data stored in a .cnv file, the data is stored as follows: # <!-- Pressure voltage, Pressure, Strain Gauge ...

environ 13 ans il y a | 1 réponse | 0

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Question

re-formatting a matrix
This is a simplistic example of a problem I am facing: depth = [0:1:20]'; data = rand(1,length(depth))'; d = [dep...

environ 13 ans il y a | 2 réponses | 0

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Question

insert an array according to the values from another variable
From the following example: time = [733774,733774,733775,733775,733775,733776,733776]; bthD = [20,10,0,15,10,20,10]; ...

plus de 13 ans il y a | 1 réponse | 0

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Question

find values from a matrix according to a criterion
I have a time series of measurements as follows: time = [733774,733774,733775,733775,733775,733776,733776]; data = [1,1....

plus de 13 ans il y a | 2 réponses | 0

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Question

plotting data from two years with day of year replacing julian date
I have the following code for producing a plot of data that extends two years in terms of day of year: time = datenum('2008...

plus de 13 ans il y a | 2 réponses | 0

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Question

Method for aligning tick labels
Is there a method of aligning tick labels? I have a figure that has two y axis where the values vary greatly. I would like to al...

plus de 13 ans il y a | 1 réponse | 0

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Question

different limits for 2 yaxis
I'm generating a plot with 2 yaxis showing two datasets with larger differences in their values, e.g. data1 = 100 + (200-10...

plus de 13 ans il y a | 2 réponses | 0

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Question

white contour on top of grayscale image
Is there a method for changing the colorscale of your figure to grayscale without using the colormap('gray') option. I have an i...

plus de 13 ans il y a | 2 réponses | 0

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Question

on the use of the accumarray function
Could someone please explain to me how the accumarray function works. For example: val = 101:105; subs = [1; 2; 4; 2; 4]...

plus de 13 ans il y a | 2 réponses | 2

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