# Chris Martin

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Question

Stacking of of power spectrum

I have computed power spectrum of number of time series of various stations. Can I stack the spectra to one power spectrum plot?...

2 years ago | 1 answer | 0

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answerQuestion

How to apply seasonal decomposition and singular spectrum analysis (SSA) technique to time series

I am having a time series and want to apply seasonal decomposition technique to extract trend and seasonal component. After gett...

2 years ago | 0 answers | 0

### 0

answersQuestion

Converting dates in time series

Dear All, I have a time seris that containts the time vector as : 27-Feb-2007 12:00:00 58.199 ...

2 years ago | 3 answers | 0

### 3

answersQuestion

Interpolation in time series for gaps in time series

I have a time series that contains daily data with gaps. I need to fill the gaps with some values. I am attaching the figure of ...

2 years ago | 1 answer | 0

### 1

answerQuestion

Averaging hourly time series data to daily time series

Dear All, I have a time series that gives values in every three hours. I want to make the hourly time series to daily time se...

3 years ago | 1 answer | 0

### 1

answerQuestion

How to compute total power of signal

I have computed power spectrum of a signal using Lomb-Scargle periodogram, I want to get the total power of the signal, Please h...

8 years ago | 1 answer | 0

### 1

answerQuestion

How to multiply a number of files by a single file ??

Dear All, I am having monthly data files(2002-2012) with three columns lat lon and value. I need to multiply these monthly ...

9 years ago | 1 answer | 0

### 1

answerQuestion

How to check convergence in Levenberg-Marquardt method

How to check convergence in a iterative non linear least squares such as Levenberg-Marquardt method

9 years ago | 1 answer | 0

### 1

answerQuestion

How to make convergence criteria for Levenberg-Marquardt algorithm

How to make convergence criteria for Levenberg-Marquardt algorithm, please give practical hint for matlab implementatio

9 years ago | 1 answer | 0

### 1

answerQuestion

How to find uncertainties of estimated parameters in Levenberg- Marquardt algorithm

Hello I have used Levenberg-Marquardt algorithm in 3 parameter problem but I unable to estimate uncertainties associated with it...

9 years ago | 2 answers | 0

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answersQuestion

How to convert the following jpg file to matlab.fig file

Hi, I am trying to convert this .jpg file to matlab.fig file. I try with imread(*.jpg) and then imagesc(:,1:end). It do displa...

9 years ago | 2 answers | 0

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answersQuestion

Can some one help me with Levenberg-Marquardt algorithm implmentation

I am having a power spectra and want to estimate the spectral index through non linear Levenberg-Marquardt method. Help me with...

9 years ago | 0 answers | 0

### 0

answersQuestion

Why I am getting an error like image Indexed CData must be size [MxN], TrueColor CData must be size [MxNx3]

I want to convert a tiff image file that contains many images

9 years ago | 1 answer | 0

### 1

answerQuestion

How to get band passed filtered time series using Butterworth

How to get band passed filtered time series using Butterworth

9 years ago | 0 answers | 0

### 0

answersQuestion

How to compute WRMS of a time series

How to compute WRMS of a time series

10 years ago | 0 answers | 0

### 0

answersQuestion

How to increase the thickness of the Ticks of the axes

How to increase the thickness of the Ticks of the axes

10 years ago | 1 answer | 0

### 1

answerQuestion

How to find uncertainties in the coefficients of polyfit

How to find uncertainties in the coefficients of polyfit

10 years ago | 2 answers | 0

### 2

answersQuestion

How to increase the size of the subplots

Dear All, I have used subplot command to plot but the figure seems to so small that I cannot recognize it, how th increase th...

10 years ago | 1 answer | 0

### 1

answerQuestion

Data gap filling in time series

Dear all, I am having a time series which having some gap in it, I want to fill the gaps, how can I do that....help me I am ...

10 years ago | 0 answers | 0

### 0

answersQuestion

What is the effect of data gaps in obtaining power spectral density using periodogram?? please help

Dear all I have computed power spectral density using periodogram of my time series data. But there is data gaps in the time se...

10 years ago | 1 answer | 0

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answerQuestion

Time delay between two time series?? using xcorr

I estimated cross correlation between two monthly time series like: [xc,lag]=xcorr(y1,y2) [mx,mind]=max(abs(xc)); delay =la...

10 years ago | 0 answers | 0

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answersQuestion

How to find time delay between two time series using cross correlation

How to find time delay between two time series using cross correlation

10 years ago | 0 answers | 0

### 0

answersQuestion

Hot to get the phase difference between two time series

Hot to get the phase difference between two time series

10 years ago | 0 answers | 0

### 0

answersQuestion

How to find minimum and maximum of a fitted curve.??

I have fitter my time series using fourier option of fit command, I want to know how to find the minimum and maximum of the fitt...

10 years ago | 1 answer | 0

### 1

answerQuestion

How to fit a time series using trigonometric functions ( sine and cosine)

How to fit a time series using trigonometric functions ( sine and cosine)

10 years ago | 0 answers | 0

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answersQuestion

How to calculate error propagation while detrending a time series

I have a time series containing value and error component associated with each value, how to calculate the error propagation in ...

10 years ago | 0 answers | 0

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answersQuestion

Hot to find gap in the time series and replaced with NaN

Hot to find gap in the time series and replaced with NaN

10 years ago | 0 answers | 0

### 0

answersQuestion

How to take monthly of time series using loop

The time series is given: 2004 1 1 0.00183 0.000244 -0.004387 2004 1 1 0.000605 -0.00152 0.004283 2004 1 1 0.000961 ...

10 years ago | 0 answers | 0

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answersQuestion

How to take monthly of time series using loop I am having data form each month( having 30/31) data values

How to take monthly average from each month using loop, and in one year there should be 12 values

10 years ago | 2 answers | 0

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answersQuestion

I having two time series one is monthly and another one is in daily, now i need to average the daily time series to the particular time values of monthly time series

the sample time series is such that for monthly: 2004.0438 1.975 2004.126 2.985 .........................

10 years ago | 1 answer | 0