[R] Printing vector

William Dunlap wdun|@p @end|ng |rom t|bco@com
Mon Jul 22 18:33:51 CEST 2019 

The following mimics Fortran printing with format
<perLine>F<fWidth>.<fPrecision>.

print1 <- function (x, perLine = 10, fWidth = 8, fPrecision = 2,
fortranStars = TRUE)
{
    format <- paste0("%", fWidth, ".", fPrecision, "f")
    oldWidth <- getOption("width")
    on.exit(options(width = oldWidth))
    options(width = perLine * fWidth)
    fx <- sprintf(format, x)
    if (fortranStars) {
        fx[nchar(fx) > fWidth] <- strrep("*", fWidth)
    }
    cat(fx, sep = "", fill = TRUE)
    invisible(x)
}

Compare
> print1((-1.7)^(1:24))
   -1.70    2.89   -4.91    8.35  -14.20   24.14  -41.03   69.76 -118.59
 201.60
 -342.72  582.62 -990.46 1683.78-2862.42
4866.12-8272.4014063.08********40642.31
********************************
with the output from the Fortran
% cat a.f
      double precision x(24);
      integer i
      do 10 i=1,24
        x(i) = (-1.7d0) ** i
 10   continue
      write(6, "(10f8.2)") x
      stop
      end
% gfortran a.f
% ./a.out
   -1.70    2.89   -4.91    8.35  -14.20   24.14  -41.03   69.76 -118.59
 201.60
 -342.72  582.62 -990.46 1683.78-2862.42
4866.12-8272.4014063.08********40642.31
********************************


Compare
Bill Dunlap
TIBCO Software
wdunlap tibco.com


On Mon, Jul 22, 2019 at 12:19 AM Rui Barradas <ruipbarradas using sapo.pt> wrote:

> Simpler, no loops:
>
>
> print0b <- function(x, len = 10, digits = 2, fill = ""){
>    n <- length(x)
>    x <- round(x, digits = digits)
>    m <- n %/% len
>    remainder <- n %% len
>    A <- matrix(x[seq_len(len*m)], ncol = len)
>    if(remainder > 0){
>      A <- rbind(A, c(x[(len*m + 1):n], rep(fill, len*(m + 1) - n)))
>    }
>    A
> }
>
>
> Hope this helps,
>
> Rui Barradas
>
> Às 07:47 de 22/07/19, Rui Barradas escreveu:
> > Hello,
> >
> > Maybe something like the following is what you want.
> > I have added an extra argument 'fill' to allow to choose what to print
> > in the end. It's default value is "" making the entire matrix elements
> > characters but it can be NA or 0.
> >
> > print0 <- function(x, len = 10, digits = 2, fill = ""){
> >    n <- length(x)
> >    x <- round(x, digits = digits)
> >    passes <- n %/% len
> >    remainder <- n %% len
> >    A <- matrix(fill, nrow = passes + (remainder > 0), ncol = len)
> >    for(i in seq_len(passes)){
> >      A[i, ] <- x[(len*(i - 1) + 1):(len*i)]
> >    }
> >    A[nrow(A), 1:remainder] <- x[(len*passes + 1):n]
> >    A
> > }
> >
> > print0(rnorm(23), 10)
> > print0(rnorm(23), 10, fill = 0)
> >
> >
> > Hope this helps,
> >
> > Rui Barradas
> >
> > Às 21:34 de 20/07/19, Steven escreveu:
> >> Dear All:
> >>
> >> Below is what I meant. Procedure print0 allows me to print a vector of
> >> length 53 in four rows of 10 plus 1 row of 3 (Ido not like the NA). This
> >> is silly. I am hoping that there is a candid way to print the matrix.
> >> Thank you.
> >>
> >> Steven Yen
> >>
> >> ===
> >> n<-53; x<-runif(n); # x<-round(x,2)
> >>
> >> print0<-function(x,c=10,digits=2){
> >> # ******************************************
> >> # Print vector in rows of a specified length
> >> # ******************************************
> >>     n<-length(x)
> >>     r<-n/c; if(n%%c>0) r<-as.integer(r)+1
> >>     y<-rep(NA,r*c)
> >>     y[1:n]<-x
> >>     y<-matrix(y,r,c,byrow=T)
> >>     y<-round(y,digits=digits)
> >>     y
> >> }
> >>
> >> print0(x,c=10,digits=3)
> >>
> >> # result
> >> # [,1]  [,2]  [,3]  [,4]  [,5]  [,6]  [,7]  [,8]  [,9] [,10]
> >> # [1,] 0.576 0.291 0.600 0.515 0.135 0.335 0.296 0.911 0.454 0.696
> >> # [2,] 0.699 0.728 0.442 0.469 0.996 0.539 0.772 0.768 0.652 0.882
> >> # [3,] 0.614 0.228 0.748 0.071 0.788 0.428 0.885 0.722 0.432 0.881
> >> # [4,] 0.422 0.148 0.459 0.870 0.044 0.421 0.282 0.337 0.751 0.579
> >> # [5,] 0.468 0.659 0.446 0.199 0.388 0.576 0.829 0.186 0.823 0.960
> >> # [6,] 0.880 0.944 0.709    NA    NA    NA    NA    NA NA    NA
> >>
> >> Steven 於 2019/7/20 下午 02:00 寫道:
> >>>
> >>> Is there a convenient way to print a vector into rows of a specified
> >>> column length? What I need is to print in the old FORTRAN format, viz.,
> >>>
> >>> format(10F8.2)
> >>>
> >>> which would print, for instance, a vector of 25 into two rows of 10
> >>> plus an incomplete row of 5. I managed to write a procedure for that
> >>> task, as shown below (except that I prefer simply blanks rather than
> >>> the NA). I am too embarrassed to even show the procedure. In short, I
> >>> like to print in the above FORTRAN format. Thank you.
> >>>
> >>> ----
> >>>
> >>> [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10] [1,] 0.66 0.26 0.82
> >>> 0.73 0.13 0.05 0.56 0.67 0.74 0.87 [2,] 0.91 0.25 0.40 0.39 0.50 0.89
> >>> 0.07 0.84 0.14 0.75 [3,] 0.38 0.08 0.86 0.97 0.56 NA NA NA NA NA
> >>
> >>     [[alternative HTML version deleted]]
> >>
> >> ______________________________________________
> >> R-help using r-project.org mailing list -- To UNSUBSCRIBE and more, see
> >> https://stat.ethz.ch/mailman/listinfo/r-help
> >> PLEASE do read the posting guide
> >> http://www.R-project.org/posting-guide.html
> >> and provide commented, minimal, self-contained, reproducible code.
> >>
> >
> > ______________________________________________
> > R-help using r-project.org mailing list -- To UNSUBSCRIBE and more, see
> > https://stat.ethz.ch/mailman/listinfo/r-help
> > PLEASE do read the posting guide
> > http://www.R-project.org/posting-guide.html
> > and provide commented, minimal, self-contained, reproducible code.
>
> ______________________________________________
> R-help using r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>

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