Gnuplot将多个数据文件的域限制在一个绘图上

Question

我使用我写的.plt文件访问来自多个不同文件的数据。每个数据集只有一个特定的域是重要的。我试图将每个数据集的特定域绘制到一个图上。

每个域中的数据对应一个峰值。我想绘制这些峰的每一个，然后将指数衰减函数拟合到峰。

这里是我的阴谋文件中的代码：

set xlabel "Time (ms)" 
set ylabel "voltage" 

set title "T1 time for Isopropyl Alcohol" 
dir='C:\Users\Daniel\Desktop\College\modern lab\gp501-win64-mingw\gnuplot\bin\data files\isoproply_alc_t1\' 
unset key 
set style data linespoints 
x(v, left, right) = (v >= left && v <= right ? v : 1/0) 
plot dir.'nmr-t1-isopropyl-dt10' using (x($0*0.01, 3, 7)):1, \ 
    dir.'nmr-t1-isopropyl-dt50' using (x($0*0.01, 20, 40)):1, \ 
    dir.'nmr-t1-isopropyl-dt100' using (x($0*0.01, 40, 60)):1, \ 
    dir.'nmr-t1-isopropyl-dt150' using (x($0*0.01, 70, 80)):1, \ 
    dir.'nmr-t1-isopropyl-dt200' using (x($0*0.01, 99, 101)):1, \ 
    dir.'nmr-t1-isopropyl-dt230' using (x($0*0.01, 114, 116)):1, \ 
    dir.'nmr-t1-isopropyl-dt250' using (x($0*0.01, 124, 126)):1, \ 
    dir.'nmr-t1-isopropyl-dt270' using (x($0*0.01, 134, 136)):1, \ 
    dir.'nmr-t1-isopropyl-dt290' using (x($0*0.01, 144, 146)):1, \ 
    dir.'nmr-t1-isopropyl-dt300' using (x($0*0.01, 149, 151)):1, \ 
    dir.'nmr-t1-isopropyl-dt320' using (x($0*0.01, 159, 161)):1, \ 
    dir.'nmr-t1-isopropyl-dt340' using (x($0*0.01, 169, 171)):1, \ 
    dir.'nmr-t1-isopropyl-dt360' using (x($0*0.01, 178, 183)):1, \ 
    dir.'nmr-t1-isopropyl-dt400' using (x($0*0.01, 198, 201)):1, \ 
    dir.'nmr-t1-isopropyl-dt430' using (x($0*0.01, 213, 217)):1, \ 
    dir.'nmr-t1-isopropyl-dt470' using (x($0*0.01, 233, 236)):1, \ 
    dir.'nmr-t1-isopropyl-dt580' using (x($0*0.01, 289, 291)):1, \ 
    dir.'nmr-t1-isopropyl-dt620' using (x($0*0.01, 309, 311)):1, \ 
    dir.'nmr-t1-isopropyl-dt650' using (x($0*0.01, 324, 326)):1, \ 
    dir.'nmr-t1-isopropyl-dt700' using (x($0*0.01, 348, 352)):1, \ 
    dir.'nmr-t1-isopropyl-dt750' using (x($0*0.01, 374, 376)):1, \ 
    dir.'nmr-t1-isopropyl-dt800' using (x($0*0.01, 399, 401)):1, \ 
    dir.'nmr-t1-isopropyl-dt850' using (x($0*0.01, 424, 426)):1, \ 
    dir.'nmr-t1-isopropyl-dt900.2' using (x($0*0.01, 449.5, 451)):1 

这给正确的域。

现在我想在y轴上翻转数据点，通过一些任意的x值。我想让他们消极。

我试过flipy命令，但是这不起作用。

Answer 1

Gnuplot不支持在单个plot命令中为每个数据文件指定单独的范围。这只适用于功能。

你必须给想要的范围，其无效的各个点的值1/0之外的所有点过滤在using语句中的数据：

left = 3 
right = 7 
plot 'file.dat' using ($0 > left && $0 < right ? $0 : 1/0):1 

为了使命令其可读性，你也可以把过滤功能。也有一些其他的可能性，以提高代码的可读性：

• 定义一个变量dir包含路径到您的文件。数据文件名，然后由.运营商利用这个变量，然后连接起来：

  dir = 'C:\my path\' 
  plot dir.'file.dat' ... 
  

• 跳过键（传奇），可以在全球范围与unset key

• 跳过您可以设置绘图样式将数据与全球文件set style data linespoints

所以，你的脚本可能看起来像

set xlabel "Time (ms)" 
set ylabel "voltage" 
set format y "%s" 

set title "T1 time for Isopropyl Alcohol" 
dir='C:\Users\Daniel\Desktop\College\modern lab\gp501-win64-mingw\gnuplot\bin\data files\isoproply_alc_t1\' 
unset key 
set style data linespoints 
x(v, left, right) = (v >= left && v <= right ? v : 1/0 
plot dir.'nmr-t1-isopropyl-dt10' using (x($0*0.01, 3, 7)):1, \ 
    dir.'nmr-t1-isopropyl-dt50' using (x($0*0.01, 20, 40)):1, \ 
    dir.'nmr-t1-isopropyl-dt100' using (x($0*0.01, 40, 60)):1, \ 
    dir.'nmr-t1-isopropyl-dt150' using (x($0*0.01, 70, 80)):1