Displaying 20 results from an estimated 3000 matches similar to: "converting multiple variable numbers"
2008 Oct 16
4
counting the frequencies of a vector
Hi,
Is there a function which counts the frequencies of the occurence of a
number within an interval?
for example I have this vector:
x <- c(1, 3, 1.2, 5, 5.9)
and I want a vector that gives me the frequencies within an interval
of 2, beginning at 0
(so the intervals are 0-2, 2-4, 4-6 and so on)
so I get these frequencies:
2, 1, 2
Which functions do I have to use for this purpose?
2008 Dec 16
2
converting a data-frame by a defined rule
Hi,
I have a data frame with several columns.
Now I want to transfer the data into a new variable (also a data
frame), but I only want a part of the data, defined by a rule ...
for example; I have following data frame:
row1 row2 row3
x 2 3
x 1 4
y 5 3
y 2 3
I know want a data frame, only with lines containing x in row1.
I know how to do that for one row (f <-
2009 Jan 17
2
splitting a string / finding a numeric value within a string
Hi,
I have this variable;
x <- c("test_01.log")
and I want to extract the number (01) out of the variable.
So that I get;
> x
[1] 1
I tried strsplit, but I don't know how to refer to the result.
Can someone help me with that?
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2009 Jan 12
2
writing an own function - is.factor
Hi,
I try to write an own function in R.
I want a summary table with descriptive statistics.
For example, I have this data.frame:
d <- data.frame(c(rep("m",5), rep("f",5)), c(1:10))
names(d) <- c("x", "y")
d
x y
1 m 1
2 m 2
3 m 3
4 m 4
5 m 5
6 f 6
7 f 7
8 f 8
9 f 9
10 f 10
now I want to get the mean and
2008 Jul 29
3
placing a text in the corner of a plot
Is there an easy way to add a text into an R-plot and place it in the
upper left corner?
Like that:
--------------------------------
| (a) |
| |
| |
| |
| |
| |
2009 Feb 08
1
sub() with "+" - invalid regular expression
Hi,
can someone help me;
I don't understand why this code doesn't do what it's supposed to do;
x <- c("F+", "F+")
x <- sub("F+", "F", x)
x
[1] "F+" "F+"
(I want "F" "F")
when I try this;
x <- c("F+", "F+")
x <- sub("+", "", x)
x
I get an error
2009 Jan 17
5
changing a range of values
Hi,
If I have following vector;
x <- c(1,1,1,2,2,3,4,4,5)
and I want to change values in the range of 1 to 3 into the value 1,
how can I do that?
I tried
x[x == c(1:3)] <- c(1)
but than I get;
x
[1] 1 1 1 2 1 1 4 4 5
R doesn't change the 2 into a 1.
But why?
2009 Jan 17
2
data.frame: how to extract parts
Hi,
I have a problem with the R syntax.
It's perhaps pretty simple, but I don't understand it ...
I can extract a column from a data.frame with the following code for
example ...
b$row1[b$row1 == "male"]
so I see all male-entries.
But I cannot extract all lines of a data.frame depending on this
criterium;
only.male <- b[b$row1 == "male"]
With that, I
2009 Jan 18
2
distance between plot-region and main-title / saving plot as pdf
Hi,
is there a way to increase the distance beween the plot (or plot-
region) and the main-title?
I haven't found anything via ?par().
Thanks for any help!
2009 Jan 22
2
plot: abline() - define line length
Hi,
is there a way to define, that a line drawn via abline() should only
go from for example -2 to 1 on the x-axis (with something working
similiar to xlim()) ?
thanks for any help!
2009 Feb 13
2
second axis title orientation
Hi,
I have added a second y-axis via axis() to a plot.
Then I tried to add an y axis title.
But the axis() function seems to have no argument like ylab.
and if I add a title with title() the text is centered at the first
axis, not the second defined one.
Is there a way to add an axis-title that orientates it's position at
the last defined axis?
2008 Sep 29
4
histogram-like plot with two variables
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2009 Jan 11
1
boxplots: yaxp does not work
Hi,
I'd like to change the y-tickmarks of a boxplot.
But it doesn't work with yaxp (like I would do it in a plot-function).
Can someone help me out?
2008 Aug 10
1
box-plot without a box surrounding the plot
Hi,
I want to draw a boxplot and I want to get rid of the surrounding box.
So that there are only the axis lines left on the bottom and on the
left.
I tried a litte bit with box() but I dont get it the way I want.
Can somebody help me out?
2008 Aug 10
1
customizing the axis (adding labels)
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2008 Dec 16
1
refer to next line within a data-frame an select cases
Hi,
I have a problem sorting and selecting entries within a data-frame and
I don't know if it is possible to solve it with R ... (probably yes,
but I have no idea how).
Following Data;
row1 row2
a 12
pos NA
a 3
neg NA
a 5
neg NA
a 11
pos NA
I want to extract the values in row 2 in the lines with an "a" in row1.
But I want to have two vectors: vector x with all
2012 Jan 30
1
Quantum scalar i40 tape partitions
Hi All,
I have a Quantum scalar i40 tape library. I need to configure it to TWO tape partition libraries, e.g., library_a and library_b, so that each library has its own tape drive. Then connect this physical tape library to two different CentOS servers so that each server can see its own media changer and tape drive. I once had a successful configuration on one host but NOT on the other. One
2004 Nov 25
4
Avoiding for-loops
Hello R-users,
I have a symmetric matrix of numerical values and I
want to obtain those values in the upper or lower
triangle of the matrix in a vector. I tried to do the
job by using two for-loops but it doens't seem to be a
clever way, and I'd like to know a more efficient code
for a large matrix of thousands of rows and columns.
Below is my code for your reference.
Thanks a lot.
2015 Aug 19
5
[PATCH 1/2] nvc0/ir: detect AND/SHR pairs and convert into EXTBF
Some shaders appear to extract bits using shift/and combos. Detect
(some) of those and convert to EXTBF instead.
Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
---
.../drivers/nouveau/codegen/nv50_ir_peephole.cpp | 66 +++++++++++++++-------
1 file changed, 46 insertions(+), 20 deletions(-)
diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp
2010 Apr 23
2
Matrix diagonal help
Hi
Suppose I have a matrix (cohort are rows and years are columns)
[2000] [2001] [2002] [2003]
[C1] 0.01 0.03 0.02 0.09
[C2] 0.06 0.05 0.07 0.11
[C3] 0.1 0.5 0.4 0.98
[C4] 0.7 0.6 0.2 0.77
I want to extracts the diagonals to get a matrix which looks like this (C1
becomes C2 in 2002, C2 becomes C3 in 2003