在Rstudio中的RMarkdown中循环生成pander表 [英] Generating pander tables in a loop in RMarkdown in Rstudio
问题描述
使用类似以下代码的代码生成一组表格: ```{r tables,echo = TRUE,eval = TRUE}
require(reshape2);要求(pander)
数据(mtcars)
数据(AirPassengers)
dta_lst < - list(mtcars,AirPassengers)
for(i in 1:length(dta_lst)){
pander(melt(head(dta_lst [[i]],n = 2),varnames = c(Something),
value.name =Some other else ),
caption = paste(Some table for:,class(dta_lst [[i]]))
}
```
$ c $当我运行代码时,它会产生所需的输出(自然,所提供的示例没有什么意义,在我正确的数据中,我将数据融合在合理的数据中方式):
----------------------- ----
变量另外
---------- ----------------
mpg 21
mpg 21
cyl 6
cyl 6
disp 160
disp 160
hp 110
hp 110
drat 3.9
drat 3.9
wt 2.62
$ b wt 2.875
$ b $ q qsec 16.46
qsec 17.02
vs 0
vs 0
am 1
am 1
齿轮4
齿轮4
碳水化合物4
碳水化合物4
-------------- -------------
表:某些表为:data.frame
-------- --------
其他
----------------
112
118
----------------
表:一些表格:ts
当我试图在Rstudio中编写代码时,pander表不会出现:
当然,如果没有循环, pander
命令就可以正常工作,并生成整齐排列在HTML文档中的表格。在for循环中,除非使用 print(x),否则不会有输出屏幕 code $函数。
$ for(i in 1:4){i}
不显示任何东西
$ b $ for(i in 1:4){print(i)}
显示数字1 2 3和4解决方案:在FOR循环中构造表(使用knitt)并将其分配给一个变量。然后用 print()
函数打印出这个变量。记得。您必须在var table之前和之后添加空行:在 print()中使用粘贴功能
I've a set of tables that I'm generating with use of the code similar to the snippet below:
```{r tables, echo=TRUE, eval=TRUE}
require(reshape2); require(pander)
data("mtcars")
data("AirPassengers")
dta_lst <- list(mtcars, AirPassengers)
for (i in 1:length(dta_lst)) {
pander(melt(head(dta_lst[[i]], n = 2), varnames = c("Something"),
value.name = "Something else"),
caption = paste("Some table for: ", class(dta_lst[[i]])))
}
```
When I run the code it produces the desired output (naturally, the provided example makes little sense, in my proper data I melt the data in sensible manner):
---------------------------
variable Something else
---------- ----------------
mpg 21
mpg 21
cyl 6
cyl 6
disp 160
disp 160
hp 110
hp 110
drat 3.9
drat 3.9
wt 2.62
wt 2.875
qsec 16.46
qsec 17.02
vs 0
vs 0
am 1
am 1
gear 4
gear 4
carb 4
carb 4
---------------------------
Table: Some table for: data.frame
----------------
Something else
----------------
112
118
----------------
Table: Some table for: ts
When I attempt to knit the code in Rstudio the pander tables do not appear:
Naturally, without the loop the pander
command works just fine and generates the tables that are neatly knitted into a HTML document.
解决方案 In the for loop there is not 'output screen' unless you use the print(x)
function.
for (i in 1:4) { i }
does not display anything
for (i in 1:4) {print(i)}
displays the Numbers 1 2 3 and 4
Solution: In the FOR loop construct the table (using knitt) and assign it into a variable. Then print out this variable using print()
function. Remember. You Must add blank lines after and before the var table: use paste function inside print()
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