Question

create cell array of individual years from a long time series
I have a matrix which is composed of a mixture of datevec and time series of measurements, e.g. time = datevec(datenum('196...

ongeveer 12 jaar ago | 1 answer | 0

1

answer

Question

save figure in a certain size
In the following figure: data = rand(1,365); subplot(121); plot(1:365,data); xlabel('label'); ylabel('label'); ...

ongeveer 12 jaar ago | 3 answers | 0

3

answers

Question

plotting data extending one year
In the following example I have a data set that extends over a section of two years. time = datenum('2008-04-17 02:00'):dat...

ongeveer 12 jaar ago | 1 answer | 0

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Question

calculating hourly means of a matrix
I have a dataset in the following format: dd = datenum('2009-04-17 02:00'); ddend = datenum('2009-11-24 12:27');...

meer dan 12 jaar ago | 2 answers | 0

2

answers

Question

same y label on both sides of contourf
From the following example: [C,h] = contourf(peaks(20),10); colormap autumn How would I include the yaxis on the left...

meer dan 12 jaar ago | 2 answers | 0

2

answers

Question

adding vector entry after each element
This is a very basic question but how would I add the elements of a vector like so...: x = [1,2,3,4,5,6]; ans = 3 6 10 15 ...

meer dan 12 jaar ago | 2 answers | 0

2

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Question

find the row number of values greater than...
I would like to find in which column a desired number is first located. From the example below: x = [0,1,3,2,5,22,24,1,2,...

meer dan 12 jaar ago | 2 answers | 0

2

answers

Question

interpolating over vectors and matrices
Consider the following example: time = 1/24:1/24:365; period = 0:0.0232:1.964; power = 0 + (1-0)*rand(85,8760); pc...

meer dan 12 jaar ago | 1 answer | 0

1

answer

Question

evaluate the variation in the power of a known periodicity
Consider the following example: t = 1/24:1/24:365; x = cos((2*pi)/12*t)+randn(size(t)); % if you have the signal proc...

meer dan 12 jaar ago | 1 answer | 0

1

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Question

analyse specific frequencies in a time series
I have a long data set of water temperature: t = 1/24:1/24:365; y = 1 + (30-1).*rand(1,length(t)); plot(t,y) The s...

meer dan 12 jaar ago | 1 answer | 0

1

answer

Question

spectral coherence between several time series
I need some advice regarding the spectral coherence of several signals. Consider the following example: t = 1:365; A =...

meer dan 12 jaar ago | 2 answers | 0

2

answers

Question

get children of a figure
I have a code below that highlights a defined region in a plot: x = 1:24; a = 1; b = 50; y = a + (b-1).*rand(lengt...

meer dan 12 jaar ago | 2 answers | 0

2

answers

Question

calculate the correlation of a number of time series
If I have a matrix: data = rand(365,5); What is the most appropriate way of calculating the correlation between each col...

meer dan 12 jaar ago | 3 answers | 0

3

answers

Question

calculate mean value for each hour of the day from a time series
I would like to calculate the hourly mean values for the following time series: DateTime = datestr(datenum('2011-01-01 00:0...

meer dan 12 jaar ago | 1 answer | 0

1

answer

Question

solid contour lines for some specific values of a contourf plot
After generating a contourf plot is it possible to draw a solid black line around some specific values? For example: [C,...

meer dan 12 jaar ago | 1 answer | 0

1

answer

Question

calculate monthly averages of time series
I have a dataset which contains measurements taken at discrete intervals for the past ~ 40 years. I would like to calculate the ...

meer dan 12 jaar ago | 1 answer | 0

1

answer

Question

subplot within a subplot
Is there a method for generating a subplot within a subplot? For example: time = 1:168; RawData = cos((2*pi)/12*time)+ra...

meer dan 12 jaar ago | 2 answers | 0

2

answers

Question

literature associated with the periodogram function
I have recently created a periodogram for some data: <http://www.mathworks.co.uk/matlabcentral/answers/42241-spectral-analysi...

meer dan 12 jaar ago | 1 answer | 0

1

answer

Question

spectral analysis for time series data
I am attempting to analyse a time series with spectral analysis and am working through the example shown in: <http://www.math...

meer dan 12 jaar ago | 2 answers | 0

2

answers

Question

generate time series
I would like to generate a time series for one year of hourly values, so for 2011 ti would 8760 values within the series. To mak...

meer dan 12 jaar ago | 1 answer | 0

1

answer

Answered
Calculate difference between two times
Its hard to suggest what you can do from your example. I would suggest converting any dates into julian dates when working in ma...

meer dan 12 jaar ago | 0

Answered
A simple question
If you have 60 rows and 3 columns in matrix 'a' then you can find the mean of each row i.e. the first three values as you stated...

meer dan 12 jaar ago | 0

| accepted

Answered
How to read the text files sequentially?
The main problem you have here is that you have not stored each of the text file names. The code shown below should solve thi...

meer dan 12 jaar ago | 1

| accepted

Question

use of horzcat
What is the use of horzcat? Is there an advantage of using horzcat over manually concatenating arrays horizontally? for example:...

meer dan 12 jaar ago | 1 answer | 0

1

answer

Answered
How do use fopen properly. Everytime I try I recieve an error.
Its hard to say without an example, which I realise is not easy in this case. I suggest to start with the help page. <http://...

meer dan 12 jaar ago | 0

Solved

Column Removal
Remove the nth column from input matrix A and return the resulting matrix in output B. So if A = [1 2 3; 4 5 6]; and ...

meer dan 12 jaar ago

Solved

Find the sum of all the numbers of the input vector
Find the sum of all the numbers of the input vector x. Examples: Input x = [1 2 3 5] Output y is 11 Input x ...

meer dan 12 jaar ago

Solved

Make the vector [1 2 3 4 5 6 7 8 9 10]
In MATLAB, you create a vector by enclosing the elements in square brackets like so: x = [1 2 3 4] Commas are optional, s...

meer dan 12 jaar ago

Answered
Save a histogram in a folder and plot it later .
I dont know if this answers your question but you could save then as a .fig file! <http://www.mathworks.co.uk/help/techdoc/cr...

meer dan 12 jaar ago | 0

Question

omitting pointers when listing folder contents
In order to list folder contents I use: TopFolder = dir('E:\'); Say if I had one file within that specific folder MATLAB...

meer dan 12 jaar ago | 2 answers | 0

2

answers