similar to: write.table column names shift

When using the write.table (say for a tab delimited file) command on a matrix with Row and Columns, the column headers are always being left shifted into the column where the row numbers are being placed. One can see this when you open up the tab delimited file in excel. Is there a better command for this, or is this supposed to be a 'feature'. Peter

Thanks for taking a look! On Tue, Oct 1, 2019 at 9:09 PM Philip Reames <listmail at philipreames.com> wrote: > On 9/27/19 1:40 PM, Roman Lebedev via llvm-dev wrote: > > In https://reviews.llvm.org/D68103 the InstCombine learned that shift-by-sext > > is simply a shift-by-zext. > > Just to make sure I'm following, the reasoning here is that the shift > amount must

Don't we need to distinguish funnel shift from the more specific rotate? I'm not seeing how rotate (a single input op shifted by some amount) gets into trouble like funnel shift (two variables concatenated and shifted by some amount). Eg, if in pseudo IR we have: %funnel_shift = fshl %x, %y, %sh ; this is problematic because either x or y can be poison, but we may not touch the poison when

The thing is, we *don't* "not demand" those high bits. We *don't* not care what's in those bits - IR shifts don't mask their shift amounts. I.e we can't replace `x >> (32-y)` with `x >> (-y)`, which would be legal transform should we not demand those bits. We very much demand them. We just know those bits to be zero. And i'm not sure how to convey

If I got poison propagation right, it's probably only by luck! Hopefully, the funnel shift bug is fixed here: https://reviews.llvm.org/rL354905 Nuno, IIUC this means that you do *not* need to change the funnel shift semantics in Alive. So I think that means we're still on track to go with John's suggestion that only select and phi can block poison? (I don't know of any

On Mon, Oct 7, 2019 at 11:32 AM Roman Lebedev <lebedev.ri at gmail.com> wrote: > > Bump. Any further thoughts here? > > To recap - i don't really see how this can be a demandedbits problem - we do > demand all those bits, we just know they must be zero. > (i would love to be proven wrong though!) > > Roman. > > On Tue, Oct 1, 2019 at 11:17 PM Roman Lebedev

There's a question about the behavior of funnel shift [1] + select and poison here that reminds me of previous discussions about select and poison [2]: https://github.com/AliveToolkit/alive2/pull/32#discussion_r257528880 Example: define i8 @fshl_zero_shift_guard(i8 %x, i8 %y, i8 %sh) { %c = icmp eq i8 %sh, 0 %f = fshl i8 %x, i8 %y, i8 %sh %s = select i1 %c, i8 %x, i8 %f ; shift amount is 0

We have these transforms from funnel shift to a simpler shift op: // fshl(X, 0, C) -> shl X, C // fshl(X, undef, C) -> shl X, C // fshl(0, X, C) -> lshr X, (BW-C) // fshl(undef, X, C) -> lshr X, (BW-C) These were part of: https://reviews.llvm.org/D54778 In all cases, one operand must be 0 or undef and the shift amount is a constant, so I think these are safe.

I have a data.frame with three columns + the row number Sample MidPoint Count [1,] 1 0.025 1 [2,] 1 0.075 3 [3,] 1 0.125 15 [4,] 1 0.175 12 [5,] 1 0.225 5 [6,] 1 0.275 8 When I export the data to a csv the column names are shifted because the row numbers are being exported as well. Sample MidPoint

Hello, This is an RFC for adding intrinsics which perform saturating signed/unsigned left shift. There is currently a patch on Phabricator here: https://reviews.llvm.org/D83216 The intrinsics are of the form i32 @llvm.sshl.sat.i32(i32, i32) i32 @llvm.ushl.sat.i32(i32, i32) <4 x i32> @llvm.sshl.sat.v4i32(<4 x i32>, <4 x i32>) <4 x i32>

Hi, I have a question about unsigned bitwise shift. According the C99 6.5.7.4 The result of E1 << E2 is E1 left-shifted E2 bit positions; vacated bits are filled with zeros. If E1 has an unsigned type, the value of the result is E1 × 2^E2, reduced modulo one more than the maximum value representable in the result type. So if unsigned b = 0x80000000; unsigned a = b << 1; a will

I want to create a vecor with frequencies. I have tried this: a <- c(1,1,1,1,2,3,4,5,5) b <- table(a) print (b[1]) which results in: > print (b[1]) 1 4 The only thing I want is the 4. So this seems obvious: print (b[1,2]) but it does not work: Error in b[1, 2] : incorrect number of dimensions How do I get a vector or how do I refer to the "4" without getting the

Friends, I have a POSIXct vector "located" in EST timezone. When I plot against it here in PST, the time axis is shifted 3 hours back in time. IOW, plot adjusts for time zone difference. Now that's really great, if that's what one wants. However, I want time axis to use actual times in object (without any shift). For example: n <- 360 y <- rnorm(n) t <- seq(from =

From: Colin Ian King <colin.king at canonical.com> The constant values being shifted are 32 bit integers and may potentially overflow on the shift. Avoid this potential overflow by making them unsigned long long values before the shift. Detected by CoverityScan, CID#1469383, 1469400 ("Unintentional integer overflow") Signed-off-by: Colin Ian King <colin.king at

I frequently work with hourly data in GMT format, and ensure that any data I read into R are expressed in GMT through as.POSIXct(mydate, tz = "GMT"). I am interested in processing air pollution data in GMT where where peaks in emissions (say from road traffic sources) tend to occur at the same LOCAL time each day. I am interested in calculating mean concentrations by hour of day i.e.

In https://reviews.llvm.org/D68103 the InstCombine learned that shift-by-sext is simply a shift-by-zext. But the transform is limited to single-use sext. We can quite trivially get a case where there are two shifts by the same sext: https://godbolt.org/z/j6mO3t <- We should handle those cases. In https://reviews.llvm.org/D68103#1686130 Sanjay Patel notes that this sext is intrusive for

Hi, For the case, please see the ".ll" file attached. Here I am doing a right shift on 32 bits by constant amount (specifically by 8). My target is an 8-bit target. Therefore while performing a shift (right or left) on long (32 bits) it is legalized in 4 smaller units. After performing the shift, this value should be stored at the same location. So order of the stores does

I want to write following data frame into a CSV file: Col1 Col2 Col3 Row1 1 1 1 Row2 2 2 2 where Row1, Row2 are the row names and Col1, Col2, Col3 are the column names. The correct CSV file should be: ,"Col1","Col2","Col3" Row1,1,1,1 Row2,2,2,2 However, the one generated by R using write.table(x, file="xyz.csv",

Hi, Let's say very simply there is a function: f <- function (x) x^2 which is evaluated with : f(2) Now, I want to do the reverse so I want to now x for f(x) = 4 So, is there a way in R to solve x for some function f(x)=a? I hope I explained it clear. cheers, Dennis -- View this message in context: http://www.nabble.com/Function-question-tp20036365p20036365.html Sent from the R

Dear all, I want to place titles above columns of data while calling write.table to create a csv.-file, like write.table( fc, file="fs.csv", append=F, sep=",", row.names=T,col.names=c("Index","Rate","Demand","Supply")) When setting "row.names=T", no column title for the index column is generated. The R Help says