R version 3.5.0 (2018-04-23) -- "Joy in Playing"
Platform: x86_64-pc-linux-gnu (64-bit)
options(digits=3)
itemInfo <- structure(list("aaa" = c(1.39633732316667,
1.32598263816667, 1.11658324066667, 1.23651072616667, 1.05368679983333,
1.03100737383333, 0.9630728395, 0.7483865045, 0.620086646166667, 0.5411017985,
0.496397607833333, 0.459528044666667, 0.427877047833333, 0.402085979666667,
0.283161181233333, 0.236896277233333), "bbb" = c(6.22533860696667,
5.229736804, 4.94816041772833, 4.17020503255333, 4.00453781427167,
3.56058007398333, 3.0125202404, 2.23782358733333, 2.14863910661167,
1.90460903044777, 1.62001089796667, 1.56341257968151, 1.23618558850667,
1.10086688908262, 0.661981500639833, 0.47397754310745), "ccc" =
c(0.5165911355, 0.462204707666667, NA, 0.219635924333333, 0.441863780833333,
0.361502865833333, NA, 0.596137946666667, NA, 0.226984771566667, NA,
0.360922661583333, 0.2145347068, 0.287756249483333, NA, NA ), "ddd" =
c(5.77538400186667, 5.115877113, NA, 4.71294520316667, 4.25952652129833,
3.68879921863167, NA, 2.01942456211145, NA, 2.02032557108, NA, 1.3818108759571,
1.80436759778167, 1.20789851993367, NA, NA), "eee" =
c(2.49725347166667, -2.67340172316667, NA, 5.64195206333333, 2.07633555233333,
2.548949539, NA, 0.465537272243167, NA, 2.34255027516667, NA, 0.5400824922975,
2.1935000655, 0.890007976866667, NA, NA)), row.names = c("skill",
"predict", "waiting", "complex",
"novelty", "creative", "evaluated",
"body", "control", "stakes", "spont",
"chatter", "present", "reward",
"feedback", "goal"), class = "data.frame")
itemInfo # examine column ddd
When I try this, column ddd has 1 fewer digits than expected. See the
attached screenshot.
Why don't all the columns have the same number of digits displayed?
--
Joshua N. Pritikin, Ph.D.
Virginia Institute for Psychiatric and Behavioral Genetics
Virginia Commonwealth University
PO Box 980126
800 E Leigh St, Biotech One, Suite 1-133
Richmond, VA 23219
http://exuberant-island.surge.sh
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Hi Joshua,
Because there are no values in column ddd less than 1.
itemInfo[3,"ddd"]<-0.3645372
itemInfo
aaa bbb ccc ddd eee
skill 1.396 6.225 0.517 5.775 2.497
predict 1.326 5.230 0.462 5.116 -2.673
waiting 1.117 4.948 NA 0.365 NA
complex 1.237 4.170 0.220 4.713 5.642
novelty 1.054 4.005 0.442 4.260 2.076
creative 1.031 3.561 0.362 3.689 2.549
evaluated 0.963 3.013 NA NA NA
body 0.748 2.238 0.596 2.019 0.466
control 0.620 2.149 NA NA NA
stakes 0.541 1.905 0.227 2.020 2.343
spont 0.496 1.620 NA NA NA
chatter 0.460 1.563 0.361 1.382 0.540
present 0.428 1.236 0.215 1.804 2.194
reward 0.402 1.101 0.288 1.208 0.890
feedback 0.283 0.662 NA NA NA
goal 0.237 0.474 NA NA NA
digits specifies the number of significant digits ("It is a suggestion
only"), so when at least one number is padded with a leading zero it
affects the formatting of the other numbers in that column. I suspect
that this is an esthetic consideration to line up the decimal points.
Jim
On Thu, May 31, 2018 at 11:18 AM, Joshua N Pritikin <jpritikin at
pobox.com> wrote:> R version 3.5.0 (2018-04-23) -- "Joy in Playing"
> Platform: x86_64-pc-linux-gnu (64-bit)
>
> options(digits=3)
>
> itemInfo <- structure(list("aaa" = c(1.39633732316667,
1.32598263816667, 1.11658324066667, 1.23651072616667, 1.05368679983333,
1.03100737383333, 0.9630728395, 0.7483865045, 0.620086646166667, 0.5411017985,
0.496397607833333, 0.459528044666667, 0.427877047833333, 0.402085979666667,
0.283161181233333, 0.236896277233333), "bbb" = c(6.22533860696667,
5.229736804, 4.94816041772833, 4.17020503255333, 4.00453781427167,
3.56058007398333, 3.0125202404, 2.23782358733333, 2.14863910661167,
1.90460903044777, 1.62001089796667, 1.56341257968151, 1.23618558850667,
1.10086688908262, 0.661981500639833, 0.47397754310745), "ccc" =
c(0.5165911355, 0.462204707666667, NA, 0.219635924333333, 0.441863780833333,
0.361502865833333, NA, 0.596137946666667, NA, 0.226984771566667, NA,
0.360922661583333, 0.2145347068, 0.287756249483333, NA, NA ), "ddd" =
c(5.77538400186667, 5.115877113, NA, 4.71294520316667, 4.25952652129833,
3.68879921863167, NA, 2.01942456211145, NA, 2.02032557108, NA, 1.3818108759571,
1.80436759778167, 1.20789851993367, NA, NA), "eee" =
c(2.49725347166667, -2.67340172316667, NA, 5.64195206333333, 2.07633555233333,
2.548949539, NA, 0.465537272243167, NA, 2.34255027516667, NA, 0.5400824922975,
2.1935000655, 0.890007976866667, NA, NA)), row.names = c("skill",
"predict", "waiting", "complex",
"novelty", "creative", "evaluated",
"body", "control", "stakes", "spont",
"chatter", "present", "reward",
"feedback", "goal"), class = "data.frame")
>
> itemInfo # examine column ddd
>
> When I try this, column ddd has 1 fewer digits than expected. See the
> attached screenshot.
>
> Why don't all the columns have the same number of digits displayed?
>
> --
> Joshua N. Pritikin, Ph.D.
> Virginia Institute for Psychiatric and Behavioral Genetics
> Virginia Commonwealth University
> PO Box 980126
> 800 E Leigh St, Biotech One, Suite 1-133
> Richmond, VA 23219
> http://exuberant-island.surge.sh
>
> ______________________________________________
> R-help at 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.
>
On Thu, May 31, 2018 at 03:30:42PM +1000, Jim Lemon wrote:> Because there are no values in column ddd less than 1.Whoa! Thank you for pointing that out.
Well pointed out, Jim!
It is infortunate that the documentation for options(digits=...)
does not mention that these are *significant digits* and not
*decimal places* (which is what Joshua seems to want):
"?digits?: controls the number of digits to print when
printing numeric values."
On the face of it, printing the value "0,517" of 'ccc' looks
like printing 4 digits! Joshua's could look even worse if 'ddd'
had values in the 1000s!
To achieve exactly what Joshua seems to want, use the round()
function. Starting with his original assignment of values to
the variable itemInfo, the result of round(itemInfo,digits=3) is:
aaa bbb ccc ddd eee
skill 1.396 6.225 0.517 5.775 2.497
predict 1.326 5.230 0.462 5.116 -2.673
waiting 1.117 4.948 NA NA NA
complex 1.237 4.170 0.220 4.713 5.642
novelty 1.054 4.005 0.442 4.260 2.076
creative 1.031 3.561 0.362 3.689 2.549
evaluated 0.963 3.013 NA NA NA
body 0.748 2.238 0.596 2.019 0.466
control 0.620 2.149 NA NA NA
stakes 0.541 1.905 0.227 2.020 2.343
spont 0.496 1.620 NA NA NA
chatter 0.460 1.563 0.361 1.382 0.540
present 0.428 1.236 0.215 1.804 2.194
reward 0.402 1.101 0.288 1.208 0.890
feedback 0.283 0.662 NA NA NA
goal 0.237 0.474 NA NA NA
Best wishes to all,
Ted.
On Thu, 2018-05-31 at 15:30 +1000, Jim Lemon wrote:> Hi Joshua,
> Because there are no values in column ddd less than 1.
>
> itemInfo[3,"ddd"]<-0.3645372
> itemInfo
> aaa bbb ccc ddd eee
> skill 1.396 6.225 0.517 5.775 2.497
> predict 1.326 5.230 0.462 5.116 -2.673
> waiting 1.117 4.948 NA 0.365 NA
> complex 1.237 4.170 0.220 4.713 5.642
> novelty 1.054 4.005 0.442 4.260 2.076
> creative 1.031 3.561 0.362 3.689 2.549
> evaluated 0.963 3.013 NA NA NA
> body 0.748 2.238 0.596 2.019 0.466
> control 0.620 2.149 NA NA NA
> stakes 0.541 1.905 0.227 2.020 2.343
> spont 0.496 1.620 NA NA NA
> chatter 0.460 1.563 0.361 1.382 0.540
> present 0.428 1.236 0.215 1.804 2.194
> reward 0.402 1.101 0.288 1.208 0.890
> feedback 0.283 0.662 NA NA NA
> goal 0.237 0.474 NA NA NA
>
> digits specifies the number of significant digits ("It is a suggestion
> only"), so when at least one number is padded with a leading zero it
> affects the formatting of the other numbers in that column. I suspect
> that this is an esthetic consideration to line up the decimal points.
>
> Jim
>
>
> On Thu, May 31, 2018 at 11:18 AM, Joshua N Pritikin <jpritikin at
pobox.com> wrote:
> > R version 3.5.0 (2018-04-23) -- "Joy in Playing"
> > Platform: x86_64-pc-linux-gnu (64-bit)
> >
> > options(digits=3)
> >
> > itemInfo <- structure(list("aaa" = c(1.39633732316667,
1.32598263816667, 1.11658324066667, 1.23651072616667, 1.05368679983333,
1.03100737383333, 0.9630728395, 0.7483865045, 0.620086646166667, 0.5411017985,
0.496397607833333, 0.459528044666667, 0.427877047833333, 0.402085979666667,
0.283161181233333, 0.236896277233333), "bbb" = c(6.22533860696667,
5.229736804, 4.94816041772833, 4.17020503255333, 4.00453781427167,
3.56058007398333, 3.0125202404, 2.23782358733333, 2.14863910661167,
1.90460903044777, 1.62001089796667, 1.56341257968151, 1.23618558850667,
1.10086688908262, 0.661981500639833, 0.47397754310745), "ccc" =
c(0.5165911355, 0.462204707666667, NA, 0.219635924333333, 0.441863780833333,
0.361502865833333, NA, 0.596137946666667, NA, 0.226984771566667, NA,
0.360922661583333, 0.2145347068, 0.287756249483333, NA, NA ), "ddd" =
c(5.77538400186667, 5.115877113, NA, 4.71294520316667, 4.25952652129833,
3.68879921863167, NA, 2.01942456211145, NA, 2.02032557108, NA, 1.381810875
> 9571, 1.80436759778167, 1.20789851993367, NA, NA), "eee" =
c(2.49725347166667, -2.67340172316667, NA, 5.64195206333333, 2.07633555233333,
2.548949539, NA, 0.465537272243167, NA, 2.34255027516667, NA, 0.5400824922975,
2.1935000655, 0.890007976866667, NA, NA)), row.names = c("skill",
"predict", "waiting", "complex",
"novelty", "creative", "evaluated",
"body", "control", "stakes", "spont",
"chatter", "present", "reward",
"feedback", "goal"), class = "data.frame")
> >
> > itemInfo # examine column ddd
> >
> > When I try this, column ddd has 1 fewer digits than expected. See the
> > attached screenshot.
> >
> > Why don't all the columns have the same number of digits
displayed?
> >
> > --
> > Joshua N. Pritikin, Ph.D.
> > Virginia Institute for Psychiatric and Behavioral Genetics
> > Virginia Commonwealth University
> > PO Box 980126
> > 800 E Leigh St, Biotech One, Suite 1-133
> > Richmond, VA 23219
> > http://exuberant-island.surge.sh
> >
> > ______________________________________________
> > R-help at 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 at 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.