Gnuplot：我的脚本似乎不错，但出现错误“无效字符 \”答案

【问题标题】：Gnuplot : My scripts seems to be good but I've the error " Invalid character \ "Gnuplot：我的脚本似乎不错，但出现错误“无效字符 \”
【发布时间】：2020-04-19 01:04:18
【问题描述】：

我想用 AIX 7.2 和 Gnuplot 4.6 创建一个 Gnuplot 脚本

我的脚本是：


set terminal png truecolor size 1950, 650  background rgb "#eff1f0"
set output "/home/tbenedet/GNUPLOT/used.png"
set datafile separator ';'

set size ratio 0.2
set bmargin at screen 0.2
unset key
set datafile separator ";"
set ylabel " MB BLOCK " font ",10" offset -1,0
set xlabel font ",10"
set xtics rotate by 45  offset -0.8,-9,-1.8


plot "/var/xxx/xxx/xxx/xxx/xxx/xxx/xxx/foo.txt" using 3:xtic(1) title column(2) with linespoints linewidth 2 pointtype 7 pointsize 1.5, \
     "/var/xxx/xxx/xxx/xxx/xxx/xxx/xxx/foo.txt" using 3:xtic(1) title column(2) with linespoints linewidth 2 pointtype 7 pointsize 1.5, \
     "/var/xxx/xxx/xxx/xxx/xxx/xxx/xxx/foo.txt" using 3:xtic(1) title column(2) with linespoints linewidth 2 pointtype 7 pointsize 1.5, \
     "/var/xxx/xxx/xxx/xxx/xxx/xxx/xxx/foo.txt" using 3:xtic(1) title column(2) with linespoints linewidth 2 pointtype 7 pointsize 1.5, \
     "/var/xxx/xxx/xxx/xxx/xxx/xxx/xxx/foo.txt" using 3:xtic(1) title column(2) with linespoints linewidth 2 pointtype 7 pointsize 1.5, \
     "/var/xxx/xxx/xxx/xxx/xxx/xxx/xxx/foo.txt" using 3:xtic(1) title column(2) with linespoints linewidth 2 pointtype 7 pointsize 1.5, \
     "/var/xxx/xxx/xxx/xxx/xxx/xxx/xxx/foo.txt" using 3:xtic(1) title column(2) with linespoints linewidth 2 pointtype 7 pointsize 1.5, \
     "/var/xxx/xxx/xxx/xxx/xxx/xxx/xxx/foo.txt" using 3:xtic(1) title column(2) with linespoints linewidth 2 pointtype 7 pointsize 1.5, \
     "/var/xxx/xxx/xxx/xxx/xxx/xxx/xxx/foo.txt" using 3:xtic(1) title column(2) with linespoints linewidth 2 pointtype 7 pointsize 1.5, \
     "/var/xxx/xxx/xxx/xxx/xxx/xxx/xxx/foo.txt" using 3:xtic(1) title column(2) with linespoints linewidth 2 pointtype 7 pointsize 1.5, \
     "/var/xxx/xxx/xxx/xxx/xxx/xxx/xxx/foo.txt" using 3:xtic(1) title column(2) with linespoints linewidth 2 pointtype 7 pointsize 1.5, \
     "/var/xxx/xxx/xxx/xxx/xxx/xxx/xxx/foo.txt" using 3:xtic(1) title column(2) with linespoints linewidth 2 pointtype 7 pointsize 1.5, \
     "/var/xxx/xxx/xxx/xxx/xxx/xxx/xxx/foo.txt" using 3:xtic(1) title column(2) with linespoints linewidth 2 pointtype 7 pointsize 1.5, \
     "/var/xxx/xxx/xxx/xxx/xxx/xxx/xxx/foo.txt" using 3:xtic(1) title column(2) with linespoints linewidth 2 pointtype 7 pointsize 1.5, \
     "/var/xxx/xxx/xxx/xxx/xxx/xxx/xxx/foo.txt" using 3:xtic(1) title column(2) with linespoints linewidth 2 pointtype 7 pointsize 1.5, \
     "/var/xxx/xxx/xxx/xxx/xxx/xxx/xxx/foo.txt" using 3:xtic(1) title column(2) with linespoints linewidth 2 pointtype 7 pointsize 1.5, \
     "/var/xxx/xxx/xxx/xxx/xxx/xxx/xxx/foo.txt" using 3:xtic(1) title column(2) with linespoints linewidth 2 pointtype 7 pointsize 1.5, \
     "/var/xxx/xxx/xxx/xxx/xxx/xxx/xxx/foo.txt" using 3:xtic(1) title column(2) with linespoints linewidth 2 pointtype 7 pointsize 1.5, \
     "/var/xxx/xxx/xxx/xxx/xxx/xxx/xxx/foo.txt" using 3:xtic(1) title column(2) with linespoints linewidth 2 pointtype 7 pointsize 1.5, \
     "/var/xxx/xxx/xxx/xxx/xxx/xxx/xxx/foo.txt" using 3:xtic(1) title column(2) with linespoints linewidth 2 pointtype 7 pointsize 1.5, \
     "/var/xxx/xxx/xxx/xxx/xxx/xxx/xxx/foo.txt" using 3:xtic(1) title column(2) with linespoints linewidth 2 pointtype 7 pointsize 1.5, \
     "/var/xxx/xxx/xxx/xxx/xxx/xxx/xxx/foo.txt" using 3:xtic(1) title column(2) with linespoints linewidth 2 pointtype 7 pointsize 1.5, \
     "/var/xxx/xxx/xxx/xxx/xxx/xxx/xxx/foo.txt" using 3:xtic(1) title column(2) with linespoints linewidth 2 pointtype 7 pointsize 1.5, \
     "/var/xxx/xxx/xxx/xxx/xxx/xxx/xxx/foo.txt" using 3:xtic(1) title column(2) with linespoints linewidth 2 pointtype 7 pointsize 1.5, \
     "/var/xxx/xxx/xxx/xxx/xxx/xxx/xxx/foo.txt" using 3:xtic(1) title column(2) with linespoints linewidth 2 pointtype 7 pointsize 1.5, \
     "/var/xxx/xxx/xxx/xxx/xxx/xxx/xxx/foo.txt" using 3:xtic(1) title column(2) with linespoints linewidth 2 pointtype 7 pointsize 1.5

乍一看，我的脚本是正确的...但是当我尝试使用gnuplot myscript.txt 运行它时，我遇到了这个错误：

plot "/var/xxx/xxx/xxx/xxx/xxx/xxx/xxx/foo.txt" using 3:xtic(1) title column(2) with linespoints linewidth 2 pointtype 7 pointsize 1.5, \ using 3:xtic(1) title column(2) with linespoints linewidth 2 pointtype 7 pointsize 1.5, \ 
                                                                                                                                                                           ^
"myscript.txt", line 14: invalid character \

我不知道是我的错误...你能告诉我吗？

谢谢

【问题讨论】：

可能你达到了行的最大长度。只尝试一行，然后再添加一行，等等......
或者\反斜杠后面可能有别的东西；例如一个 CR 字符 (0x0d)

标签： plot gnuplot aix

【解决方案1】：

您的绘图命令的长度约为 3600 个字符。我不确定是否有长度限制，或者至少它必须超过 10'000，因为我尝试了超过 10'000 个字符的类似命令，但我没有收到您的错误。顺便说一句，如果你不知道，你可以缩短不少关键字：using to u, title to ti, with to w, linespoints to @987654328 @、linewidth 到 lw、pointtype 到 pt 和 pointsize 到 ps

我猜（正如 Lorinczy Zsigmond 已经提到的）你在 \ 之后有一些“隐形”字符，它也可能是 empty space 或 TAB。一些合理的文本编辑器可以使“不可见”的字符“可见”。检查同一行中\之后是否有字符。

来自 gnuplot 手册。检查help introduction：

命令可以通过以反斜杠 () 结束每一行但最后一行结束的方式延伸到多个输入行。反斜杠必须是每一行的 last 字符。效果就好像反斜杠和换行符不存在一样。也就是说，没有隐含空格，也没有终止注释。因此，注释掉一个连续的行 cmets 会删除整个命令（请参阅 cmets）。但请注意，如果在多行命令的某处发生错误，解析器可能无法准确定位错误所在的位置，并且在这种情况下不一定会指向正确的行。

【讨论】：