23 Feb
2003
23 Feb
'03
11:35 a.m.
This is a multi-part message in MIME format.
------=_NextPart_000_0042_01C2DB2F.AAC0E7B0
Content-Type: text/plain;
charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
Does anyone know of a function in R that multiplies all of the elements =
of a vector together (kinda like sum(), except for multiplication =
instead of addition)? Or is there any other clever way people have come =
up with to do the products in 2c?
-Ryan
------=_NextPart_000_0042_01C2DB2F.AAC0E7B0
Content-Type: text/html;
charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=3DContent-Type content=3D"text/html; =
charset=3Diso-8859-1">
<META content=3D"MSHTML 6.00.2600.0" name=3DGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D#ffffff>
<DIV><FONT face=3DArial size=3D2>Does anyone know of a function in R =
that multiplies=20
all of the elements of a vector together (kinda like sum(), except for=20
multiplication instead of addition)? Or is there any other clever =
way=20
people have come up with to do the products in 2c?</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial
size=3D2>-Ryan</FONT></DIV></BODY></HTML>
------=_NextPart_000_0042_01C2DB2F.AAC0E7B0--
23 Feb
23 Feb
11:55 a.m.
-----Original Message-----
Does anyone know of a function in R that multiplies all of the elements
of a vector together (kinda like sum(), except for multiplication
instead of addition)? Or is there any other clever way people have come
up with to do the products in 2c?
-Ryan
prod()
-----Original Message-----
How do you plot in R with one or both axes as a log scale, instead of a
linear scale? (can you do it with the plot() command?)
-Ryan
Inside the plot command, add the parameter log="x" to plot the x-axis on
log scale. Use "y" for y, use "xy" for both.
-----Original Message-----
What is the Student t distribution?
-Ryan
One definition is t = Z / sqrt(U / n), where Z ~ N(0, 1), U ~ chisq with
n degrees of freedom.
1:07 p.m.
New subject: [gov2001-l] plotting the binomial
Hi all,
When I plotted the probability mass function of the binomial, I noticed
that it doesn't matter whether you type plot(binomial) or plot(y,
binomial). Do you know why?
Thanks,
Maria
1:56 p.m.
New subject: [gov2001-l] plotting the binomial
Say you have a vector:
x <- c(2, 4, 6)
Then if you do:
plot(x)
You get a graph of the points (1, 2), (2, 4), and (3, 6).
Now, say you have another vector:
y <- c(0, 1, 2)
If you do:
plot(x, y)
You will get the points (0, 2), (1, 4), and (2, 6).
The reason it works for your binomial is that your "y" is probably a
vector of c(1, 2, 3, 4, ...). As a result, plot(binomial) and plot(y,
binomial will be identical.
Charles
On Sun, 23 Feb 2003, Maria Popova wrote:
Hi all,
When I plotted the probability mass function of the binomial, I noticed
that it doesn't matter whether you type plot(binomial) or plot(y,
binomial). Do you know why?
Thanks,
Maria
_______________________________________________
gov2001-l mailing list
gov2001-l(a)fas.harvard.edu
http://www.fas.harvard.edu/mailman/listinfo/gov2001-l
7752
days inactive
7752
days old
gov2001@lists.gking.harvard.edu
3 comments
4 participants
participants (4)
-
cduan＠fas.harvard.edu -
kdong＠fas.harvard.edu -
popova＠fas.harvard.edu -
rdavies＠fas.harvard.edu