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# Richard

Attivo dal 2011

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Domanda

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...

oltre 7 anni fa | 1 risposta | 0

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Domanda

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...

circa 10 anni fa | 1 risposta | 0

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Domanda

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...

circa 10 anni fa | 2 risposte | 0

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Domanda

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...

circa 10 anni fa | 1 risposta | 0

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Domanda

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...

circa 10 anni fa | 1 risposta | 0

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Domanda

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);...

circa 10 anni fa | 3 risposte | 0

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Domanda

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

circa 10 anni fa | 2 risposte | 0

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Domanda

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...

circa 10 anni fa | 3 risposte | 0

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Domanda

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...

circa 10 anni fa | 1 risposta | 0

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Risposto
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...

circa 10 anni fa | 0

Domanda

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....

circa 10 anni fa | 0 risposte | 0

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Risposto
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;

circa 10 anni fa | 0

Risposto
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','....

circa 10 anni fa | 1

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

circa 10 anni fa | 1

| accettato

Domanda

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...

circa 10 anni fa | 2 risposte | 0

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Domanda

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...

circa 10 anni fa | 1 risposta | 0

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Risposto
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');

circa 10 anni fa | 8

Domanda

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...

circa 10 anni fa | 1 risposta | 0

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Domanda

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).*...

circa 10 anni fa | 1 risposta | 0

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Domanda

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...

circa 10 anni fa | 1 risposta | 0

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Domanda

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,...

circa 10 anni fa | 1 risposta | 0

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Domanda

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 ...

circa 10 anni fa | 1 risposta | 0

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Domanda

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...

oltre 10 anni fa | 2 risposte | 0

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Domanda

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]; ...

oltre 10 anni fa | 1 risposta | 0

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Domanda

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....

oltre 10 anni fa | 2 risposte | 0

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Domanda

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...

oltre 10 anni fa | 2 risposte | 0

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Domanda

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...

oltre 10 anni fa | 1 risposta | 0

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Domanda

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...

oltre 10 anni fa | 2 risposte | 0

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Domanda

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...

oltre 10 anni fa | 2 risposte | 0

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Domanda

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]...

oltre 10 anni fa | 2 risposte | 2

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