我在warbleR包中使用specan函数。我将数据帧作为第一个参数传递：
> dfram
sound.files selec start end
1 combined.wav 1-1 1.355985 2.082049
2 combined.wav 1-2 2.255236 3.277800
3 combined.wav 1-3 3.326175 3.715613
4 combined.wav 1-4 4.401239 5.181053
5 combined.wav 1-5 5.219428 6.062491
6 combined.wav 1-6 6.198241 6.557867
7 combined.wav 1-7 6.761805 7.475555
8 combined.wav 1-8 7.700681 7.720493
9 combined.wav 1-9 7.808243 7.913994
10 combined.wav 1-10 9.432433 11.048685
11 combined.wav 1-11 11.302560 12.403499
12 combined.wav 1-12 14.304127 16.789755
13 combined.wav 1-13 18.258944 19.555946
14 combined.wav 1-14 21.373323 24.397577
15 combined.wav 1-15 25.322140 28.434769
16 combined.wav 1-16 29.318708 31.703398
17 combined.wav 1-17 33.231588 36.347154
18 combined.wav 1-18 38.280157 41.536661
19 combined.wav 1-19 43.434038 46.607605
20 combined.wav 1-20 48.368232 50.659610
整个函数调用是：
specan(dfram,path="path to folder", bp=c(0,16))
这会产生以下错误：
Error in seq.default(1, n - wl, wl - (ovlp * wl/100)) :
wrong sign in 'by' argument
In addition: Warning messages:
1: In if (bp != "frange") { :
the condition has length > 1 and only the first element will be used
2: In if (bp == "frange") bp <- c(X$low.f[i], X$high.f[i]) :
the condition has length > 1 and only the first element will be used
3: In if (bp == "frange") bp <- c(X$low.f[i], X$high.f[i]) :
the condition has length > 1 and only the first element will be used
4: In if (bp == "frange") bp <- c(X$low.f[i], X$high.f[i]) :
the condition has length > 1 and only the first element will be used
5: In if (bp == "frange") bp <- c(X$low.f[i], X$high.f[i]) :
the condition has length > 1 and only the first element will be used
6: In if (bp == "frange") bp <- c(X$low.f[i], X$high.f[i]) :
the condition has length > 1 and only the first element will be used
7: In if (bp == "frange") bp <- c(X$low.f[i], X$high.f[i]) :
the condition has length > 1 and only the first element will be used
8: In if (bp == "frange") bp <- c(X$low.f[i], X$high.f[i]) :
the condition has length > 1 and only the first element will be used
9: In if (bp == "frange") bp <- c(X$low.f[i], X$high.f[i]) :
the condition has length > 1 and only the first element will be used
任何帮助都将不胜感激。