Community Profile

# Guido Travaglini

### Università di Roma "La Sapienza"

27 total contributions since 2005

Professional Interests: Statistics, Econometrics, Solar Physics.

Contributions in
View by

Submitted

An econometric investigation of the sunspot numbers since the year 1700
Econometric analysis of the properties of sunspot numbers from 1700 through the 22.d century

Posted

different colors for consecutive areas
Hi all, I have 2 consecutive vectors X1(T1), X2(T2), where T1, T2 are their respective length. I can plot easily XALL=[X1;X2], y...

2 years ago | 891 views

Submitted

Hockey stick and climate change
Anthropogenic Global Warming (AGW) debunked by means of Bayesian Calibration

Solved

Times 2 - START HERE
Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...

5 years ago

Submitted

Amortization schedule with variable interest rates
Computes & optionally saves & plots some variables, like interest paid and balance outstanding.

Problem to import data from Excel to Matlab
Make sure the path shown in the "Current Folder" window is the same where your XLS file resides.

5 years ago | 0

Responded

Re: Saving text and numeric data with xlswrite
Thanx kinor, however I needed a somewhat different problem to solve, that is: C={'Arts','Science','Cinema'}; for i=1:3 disp([C(1...

6 years ago | 4580 views

Posted

Saving text and numeric data with xlswrite
I have the following string and I want to save with xlswrite the following displayed text and numeric data output: C={'Art','S...

6 years ago | 4580 views

Responded

Re: Advanced PCA Problem: Application to Timeseries
One possible way to deal with time-changing PCA shares in a time series context would be to perform PCACOV with level breaks (r...

7 years ago | 11132 views

Responded

Re: print string and numbers
Many thanx us!

7 years ago | 2129 views

Posted

print string and numbers
I am new to Matlabs printing tools (e.g. sprintf) and I am unable in due time to perform a very simple task. I have 2 vectors of...

7 years ago | 2129 views

Responded

Re: saving a vector of strings
Thanx a lot, us, it works great! Guido.

7 years ago | 1290 views

Posted

saving a vector of strings
I have a vector of integers N>1 and I want to save the following strings: for i=1:N horzcat('X_',num2str(i)) end into a text v...

7 years ago | 1290 views

Responded

Re: delete rows in a matrix
Many thanx, your suggestions were precious, guido

7 years ago | 3342 views

Responded

Re: delete rows in a matrix
Many thanx, guido

7 years ago | 3342 views

Posted

delete rows in a matrix
Is there a quick way to delete rows one at a time from a matrix of size n-by-n? The objective is to obtain a sequence of n matri...

7 years ago | 3342 views

Responded

Re: correlation
The problem is simpler than I've thought. I've lost(!) the function STATGETARGS and also STATSIZECHK, which affect this file and...

7 years ago | 7310 views

Responded

Re: correlation
The file corr.m has never been removed from the Stats Toolbox, nor have I any duplicates. I have pasted it, as follows: functio...

7 years ago | 7310 views

Posted

correlation
Recently my corr.m file does not work properly. Suppose I have two series x and y of equal length, performing corr(x,y) produces...

7 years ago | 7310 views

Posted

For tutorial purposes I want to estimate by FMINUNC an Ordinary Least Squares (OLS) problem. I minimize the sum of squared error...

8 years ago | 1347 views

Posted

Yearly to quarterly conversion.
I have the following vector: mydates=[1976:2005]'; and I want to create both a datenum and a datestr of mydates that includes qu...

8 years ago | 3054 views

Posted

Edgeworth expansion
both standard normal and normal? Regards, jay.

8 years ago | 2226 views

Posted

opening window matlabrc
Whenever I open Matlab (2008a) I get a message in the window that says: " Warning: Executing startup failed in matlabrc. This i...

8 years ago | 8225 views

Posted

Filling an array
I have a vector a=[1 2 3 5 8 9 10] which I want to fill with zeros to obtain b=[1 2 3 0 5 0 0 8 9 10], i.e. a time series with ...

9 years ago | 2104 views

Posted

Looping over different datasets.
I have m different datasets, Aj (j=1,...m), each stored as .MAT file. Each Aj (j=1,...m) is of different size [n q], where n=row...

11 years ago | 558 views

Posted

Heteroskedastic artificial series
How can I create artificial series characterized by heteroskedasticity,i.e. by larger variance the larger the mean? Thanks to an...

11 years ago | 557 views

Posted

vector sizing
I have a n-sized vector PVEC of p-values. I want to form a new (n-k)-sized vector containing only the p-values<0.05, thereby exc...

11 years ago | 610 views