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**Content Feed**

Question

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...

7 years ago | 1 answer | 0

### 1

answerQuestion

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...

9 years ago | 1 answer | 0

### 1

answerQuestion

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...

9 years ago | 2 answers | 0

### 2

answersQuestion

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...

9 years ago | 1 answer | 0

### 1

answerQuestion

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...

9 years ago | 1 answer | 0

### 1

answerQuestion

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);...

9 years ago | 3 answers | 0

### 3

answersQuestion

calculate week of year

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

9 years ago | 2 answers | 0

### 2

answersQuestion

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...

9 years ago | 3 answers | 0

### 3

answersQuestion

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...

9 years ago | 1 answer | 0

### 1

answerWhy 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...

9 years ago | 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....

9 years ago | 0 answers | 0

### 0

answersHi, 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;

9 years ago | 0

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','....

9 years ago | 1

Saving outputs in workspace

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

9 years ago | 1

| accepted

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...

9 years ago | 2 answers | 0

### 2

answersQuestion

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...

9 years ago | 1 answer | 0

### 1

answerno 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');

9 years ago | 7

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...

9 years ago | 1 answer | 0

### 1

answerQuestion

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).*...

9 years ago | 1 answer | 0

### 1

answerQuestion

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...

9 years ago | 1 answer | 0

### 1

answerQuestion

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,...

9 years ago | 1 answer | 0

### 1

answerQuestion

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 ...

9 years ago | 1 answer | 0

### 1

answerQuestion

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...

9 years ago | 2 answers | 0

### 2

answersQuestion

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]; ...

9 years ago | 1 answer | 0

### 1

answerQuestion

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....

9 years ago | 2 answers | 0

### 2

answersQuestion

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...

9 years ago | 2 answers | 0

### 2

answersQuestion

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...

9 years ago | 1 answer | 0

### 1

answerQuestion

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...

9 years ago | 2 answers | 0

### 2

answersQuestion

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...

9 years ago | 2 answers | 0

### 2

answersQuestion

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]...

9 years ago | 2 answers | 2