Displaying 20 results from an estimated 10000 matches similar to: "Stock Price Correlation to Index Price Levels"
1999 Oct 07
1
[Fwd: Libraries loading, but not really?] - it really IS a problem :-(
kalish at psy.uwa.edu.au wrote:
>
> I'm a newbie at R, and can't get libraries to really work.
> I did this:
> > library(help = mva)
> cancor Canonical Correlations
> cmdscale Classical (Metric) Multidimensional Scaling
> dist Distance Matrix Computation
> hclust Hierarchical Clustering
2011 Jan 30
1
Finding the correlation coefficient of two stocks
veepsirtt wrote:
>
> corr <- cor(s1,s2)
> Error in cor(s1, s2) : incompatible dimensions
>
>
Check lenghts of your series.
cor(c(1,2),c(1,2,3))
#Error in cor(c(1, 2), c(1, 2, 3)) : incompatible dimensions
Dieter
--
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Sent from the R help
2011 Mar 21
2
Correlation for no of variables
Dear R helpers,
Suppose I have stock returns data of say 1500 companies each for say last 4 years. Thus I have a matrix of dimension say 1000 * 1500 i.e. 1500 columns representing companies and 1000 rows of their returns.
I need to find the correlation matrix of these 1500 companies.
So I can find out the correlation as
cor(returns) and expect to get 1500 * 1500 matrix. However, the process
2006 Jul 17
3
Correlation Mapping
On the cover of Zivot and Wang's Modeling Financial Time Series with S
Plus, there is a correlation plot that seems to indicate the strength
of correlation with color-coded squares, so that more highly
correlated stocks appear darker red. If anybody out there is familiar
with the book or understands what I am talking about, I am curious as
to whether or not there is a similar function in R
2007 Oct 26
2
calculating correlation of a Supply/Demand measure and price change (in high frequency time series data)
Regarding "financial" data: I have a high frequency (1 minute) measure of
supply/demand and I'd like to know if it has any influence on short term
price changes (also 1 minute).
Question: How do I calculate the correlation between this supply/demand
measure and price changes (correctly)?
Some facts about that data:
The price changes and supply/demand measure are non-normal. An
2005 Sep 19
1
minimal hedge variance ratio
Hi all
i have two data sets, spot and futures cash market prices. to estimate
the minimum variance hedge ratio, i first had a glance on the
correlation coefficient of relative price change (ln(St / St-1).
surprizingly the value is just 0.2 compared to actual price
correlation of 0.9. (i did regress the spot change on future change,
co-effi is 0.3, and R2 is only 0.025
a) in such scenario can
2005 Feb 07
5
Creating a correlation Matrix
Hi all:
I have a question on how to go about creating a correlation matrix. I have
a huge amount of data....21 variables for 3471 times. I want to see how
each of the variables correlate to each other. Any help would be
appreciated, including which package and which functions I should use to do
this.
Thanks,
Jessica Higgs
Masters Student
Department of Meteorology
Penn State University
2008 Feb 08
2
correlation
Dear list
I would like to compare two measurements of disease severity (M1 and
M2), one of the is continuous (M1 ranging from 1 to 10) and the other
is ordinal (M2 takes Low, Medium, high and very high). Do you think is
ok to use cor() function to test whether the two agree, i.e correlate?
I am afraid that if I set M2 to 1,2,3 and 4, the function cor() will
take them as continuous and
2012 Dec 03
4
How to calculate the spatial correlation of several files?
dir1 <- list.files("C:\\Users\\aalyaari\\Desktop\\cor", "*.bin",
full.names = TRUE)
dir2 <- list.files("C:\\Users\\aalyaari\\Desktop\\cor2", "*.bin",
full.names = TRUE)
results <- list()
for (.files in dir1){ # read in the 365 files as a vector of
numbers for dir1
file1 <- do.call(rbind,(lapply(.files, readBin ,
2010 Jan 21
1
correlation significance testing with multiple factor levels
[Apologies in advance if this is too "statistics" and not enough "R".]
I've got an experiment with two sets of treatments. Each subject either received
all treatments from set A or all treatments from set B.
I can compute the N pairwise correlations for all treatments in either set using
cor(). If I take the mean of these N pairwise correlations, I see that the
effects
2017 Jul 05
3
Question about correlation
Greeting.
Dear Mr/Mrs/Miss,
OTU ID Health Disease
Bacterial 1 0.29 0.34
Bacterial 2 0.25 0.07
Bacterial 3 0.06 0.06
Bacterial 4 0.07 0.09
Bacterial 5 0.02 0.05
Above show the first 6 data sets, may I ask that the reason of R show the
error like "Error in cor(data) : 'x' must be numeric" ? And how to solve
it? Besides, isn't this data can conduct correlation matrix?
2008 Oct 10
1
Correlation among correlation matrices cor() - Interpretation
Hello,
If I have two correlation matrices (e.g. one for each of two treatments) and
then perform cor() on those two correlation matrices is this third
correlation matrix interpreted as the correlation between the two
treatments?
In my sample below I would interpret that the treatments are 0.28
correlated. Is this correct?
> var1<- c(.000000000008, .09, .1234, .5670008, .00110011002200,
2005 Jun 29
3
moving correlation coef ?
Hello,
R gives us the correlation functions cor(). (Many thanks ;-))
Does it also exist a "moving correlation" coefficient ?
(like the moving average).
If not, could someone give me some infos or link
on how to practically implement such a function in R.
(I did search for "moving correlation" on the R homepage
but didn't find anything.)
Thank you.
Vincent
2009 Feb 12
3
get top 50 correlated item from a correlation matrix for each item
Hi,
I have a correlation matrix of about 3000 items, i.e., a 3000*3000
matrix. For each of the 3000 items, I want to get the top 50 items that
have the highest correlation with it (excluding itself) and generate a
data frame with 3 columns like ("ID", "ID2", "cor"), where ID is those
3000 items each repeat 50 times, and ID2 is the top 50 correlated items
with ID,
2011 Nov 16
4
Pairwise correlation
Dear All,
I am not familiar with R yet I want to use it to perform some task, hence my
posting here. I hope someone can help.
I have a set of data, genes (rows) and samples (columns). I want to do a
Pearson correlation on all the possible pairwise combinations of all the
genes (2000). Does anyone have an idea of how to execute this in R?
Thanks in advance.
--
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2017 Jul 05
2
Question about correlation
On 2017-07-05 11:56, Jim Lemon wrote:
> Hi Chin Yi,
> If you are trying to correlate "Health" with "Disease", i.e.
>
> cydf<-read.table(text="OTU ID Health Disease
> Bacterial 1 0.29 0.34
> Bacterial 2 0.25 0.07
> Bacterial 3 0.06 0.06
> Bacterial 4 0.07 0.09
> Bacterial 5 0.02 0.05",
> header=TRUE)
>
2011 Apr 07
3
Correlation Matrix
Listers,
I have a question regarding correlation matrices. It is fairly straight
forward to build a correlation matrix of an entire data frame. I simply use
the command cor(MyDataFrame). However, what I would like to do is construct
a smaller correlation matrix using just three of the variable out of my data
set.
When I run this:
cor(MyDataFrame$variable1,
2017 Jul 05
0
Question about correlation
Hi Chin Yi,
If you are trying to correlate "Health" with "Disease", i.e.
cydf<-read.table(text="OTU ID Health Disease
Bacterial 1 0.29 0.34
Bacterial 2 0.25 0.07
Bacterial 3 0.06 0.06
Bacterial 4 0.07 0.09
Bacterial 5 0.02 0.05",
header=TRUE)
print(cor(cydf$Health,cydf$Disease))
[1] 0.7103517
If you are getting that error, it probably means that
2009 Sep 20
4
correlation help
Dear group,
I have a matrix like the following:
Name Sample1 sample2 sample3 sample4 ..... sample(n)
nm1 10.5 13.5 30 31
nm2 8 11 34 29
nm3 9 10.3 27.8 35
nm(j)
I want to be able to calculate correlation between all pairs of names.
For example (nm1,nm2),
2008 Apr 05
2
pearson's correlation
Hello,
I used the function cor to calculate the pearson correlation coefficient between variables. However, the resulting values do not correspond to the outcome of my excel-calculations, for which I used the formula Cor(x,y)=Cov(x,y)/(SD(x)*SD(y))
So my question is: How does the function "cor" compute the pearson correlation coefficient?
Thank you in advance,
Ake Nauta