为什么密钥在最新的Gnuplot中失败了？

Question

线程Why autotitle wrong in this Gnuplot?的代码在旧的Gnuplot（19.4.2015）中有效，但在最新的Ubuntu 15.10和OS X 10.11.2中失败了。 数据

Model Decreasing-err Constant-err Increasing-err 
2025 73-78 80-85 87-92 
2035 63-68 80-85 97-107 
2050 42-57 75-90 104.5-119.5 

代码最初基于Christoph的回答here

set terminal qt size 560,270; 
set grid; set offset 1,1,0,0; 
set datafile separator " -"; 
set key autotitle columnhead;
plot for [i=2:6:2] "model1_range.dat" using 1:(0.5*(column(i)+column(i+1))):(0.5*(column(i+1)-column(i))) with yerrorlines; 

Ubuntu 15.10 Gnuplot 4.6 patchlevel 6 中的输出，其中两个密钥错过两次警告warning: Cannot find or open the file "model1_range_linear.dat"所以两个错过错误栏

输出是OS X 10.11.2中带有 Gnuplot 5.0 patchlevel 1 的三个警告和No data in plot没有任何错误条。 我无法理解两个系统和Gnuplot版本4/2015之间的异构行为。

为什么键失败了最新的Gnuplot？

Answer 1

这是我输入的内容：

08:26 ~ > cat test.txt 
Model Decreasing-err Constant-err Increasing-err 
2025 73-78 80-85 87-92 
2035 63-68 80-85 97-107 
2050 42-57 75-90 104.5-119.5 

然后通过brew install gnuplot --with-pdflib-lite --with-x11 --with-cairo

安装gnuplot

08:26 ~ > gnuplot

    G N U P L O T
    Version 5.0 patchlevel 1    last modified 2015-06-07 

    Copyright (C) 1986-1993, 1998, 2004, 2007-2015
    Thomas Williams, Colin Kelley and many others

    gnuplot home:     http://www.gnuplot.info
    faq, bugs, etc:   type "help FAQ"
    immediate help:   type "help"  (plot window: hit 'h')

Terminal type set to 'x11'
gnuplot> show version long

    G N U P L O T
    Version 5.0 patchlevel 1    last modified 2015-06-07 

    Copyright (C) 1986-1993, 1998, 2004, 2007-2015
    Thomas Williams, Colin Kelley and many others

    gnuplot home:     http://www.gnuplot.info
    faq, bugs, etc:   type "help FAQ"
    immediate help:   type "help"  (plot window: hit 'h')
Compile options:
-READLINE  +LIBREADLINE  +HISTORY  
-BACKWARDS_COMPATIBILITY  +BINARY_DATA  
+GD_PNG  +GD_JPEG  +GD_TTF  +GD_GIF  +ANIMATION  
-USE_CWDRC  +X11  +X11_POLYGON  +MULTIBYTE  +X11_EXTERNAL +USE_MOUSE  +HIDDEN3D_QUADTREE  
+DATASTRINGS  +HISTOGRAMS  +OBJECTS  +STRINGVARS  +MACROS  +THIN_SPLINES  +IMAGE  +USER_LINETYPES +STATS +EXTERNAL_FUNCTIONS 
MAX_PARALLEL_AXES=7

GNUPLOT_DRIVER_DIR = "/usr/local/Cellar/gnuplot/5.0.1/libexec/gnuplot/5.0"
GNUPLOT_PS_DIR     = "/usr/local/Cellar/gnuplot/5.0.1/share/gnuplot/5.0/PostScript"
HELPFILE           = "/usr/local/Cellar/gnuplot/5.0.1/share/gnuplot/5.0/gnuplot.gih"
gnuplot> set grid; set offset 1,1,0,0;  
gnuplot> set datafile separator " -"; 
gnuplot> set key autotitle columnhead;
gnuplot> plot for [i=2:6:2] "test.txt" using 1:(0.5*(column(i)+column(i+1))):(0.5*(column(i+1)-column(i))) with yerrorlines; 
gnuplot> 

希望它有所帮助！