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...

plus de 11 ans il y a | 1 réponse | 0

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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'); ...

plus de 11 ans il y a | 3 réponses | 0

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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...

plus de 11 ans il y a | 1 réponse | 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');...

plus de 11 ans il y a | 2 réponses | 0

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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...

plus de 11 ans il y a | 2 réponses | 0

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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 ...

plus de 11 ans il y a | 2 réponses | 0

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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,...

plus de 11 ans il y a | 2 réponses | 0

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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...

plus de 11 ans il y a | 1 réponse | 0

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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...

plus de 11 ans il y a | 1 réponse | 0

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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...

plus de 11 ans il y a | 1 réponse | 0

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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 =...

presque 12 ans il y a | 2 réponses | 0

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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...

presque 12 ans il y a | 2 réponses | 0

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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...

presque 12 ans il y a | 3 réponses | 0

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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...

presque 12 ans il y a | 1 réponse | 0

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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,...

presque 12 ans il y a | 1 réponse | 0

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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 ...

presque 12 ans il y a | 1 réponse | 0

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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...

presque 12 ans il y a | 2 réponses | 0

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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...

presque 12 ans il y a | 1 réponse | 0

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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...

presque 12 ans il y a | 2 réponses | 0

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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...

presque 12 ans il y a | 1 réponse | 0

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A répondu
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...

presque 12 ans il y a | 0

A répondu
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...

presque 12 ans il y a | 0

| A accepté

A répondu
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...

presque 12 ans il y a | 1

| A accepté

Question

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

presque 12 ans il y a | 1 réponse | 0

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A répondu
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://...

presque 12 ans il y a | 0

A résolu

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 ...

presque 12 ans il y a

A résolu

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 ...

presque 12 ans il y a

A résolu

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...

presque 12 ans il y a

A répondu
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...

presque 12 ans il y a | 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...

presque 12 ans il y a | 2 réponses | 0

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