Question

我想在plotly生成一个数字，就像下图用基础R图形生成一样：

上图中的R代码如下：

x = c(1,2,3,4,5)
y = c(0.1, 1, 10, 100, 1000)
axseq = y
plot(x, log10(y), yaxt="n")
axis(2, at=log10(axseq), labels=as.character(axseq))
for (i in 1:5){
    bb = 1:10; a = (bb*10^(i-2));   axis(2, at=log10(a), tcl=-0.25, labels=F)
}

到目前为止，我对同一个数字的plotly代码如下：

p = plot_ly(x=x, y=log10(y), mode="markers") %>%
layout(yaxis = list(tickmode="array", tickvals=log10(axseq), ticktext=as.character(axseq), zeroline=F, showline=T, ticks="outside"),
       xaxis = list(showline=T, ticks="outside"))

它有主要的刻度，但我找不到如何在y轴上添加次刻度。

Answer 1

当您开始实施时，您可以通过指定它们的值（使用tickvals）和标签（使用ticktext）来自定义刻度。但您需要为tickvals中的每个刻度位置设置一个值，并且每个tickval都需要相应的ticktext。因此，区分主要和次要刻度的方法是将ticktext设置为所有次要刻度的空字符串（因为在情节上没有办法指定次要刻度本身）。 / p>

tval <- sort(as.vector(sapply(seq(1,9), function(x) x*10^seq(-1,3)))) #generates a sequence of numbers in logarithmic divisions
ttxt <- rep("",length(tval))  # no label at most of the ticks
ttxt[seq(1,37,9)] <- as.character(tval)[seq(1,37,9)] # every 9th tick is labelled

p = plot_ly(x=x, y=y, mode="markers") %>%
  layout(yaxis = list(type="log",
                      zeroline=F, showline=T, 
                      ticks="outside",
                      tickvals=tval,
                      ticktext=ttxt),
         xaxis = list(showline=T, ticks="outside"))
p

Answer 2

我通过添加一条不可见的痕迹和第二个y轴找到了一个解决方案，它有点像黑客，但它有效：

library(plotly)
x = c(1,2,3,4,5)
y = c(0.1, 1, 10, 100, 1000)
axseq = y

minTickLoc = numeric()
    for (i in 1:5){
    bb = 1:10;
    minTickLoc = c(minTickLoc, (bb*10^(i-2)))
}


p = plot_ly(x=x, y=y, mode="markers", marker=list(opacity=0), showlegend=F) %>%    
   add_trace(x=x, y=y, mode="markers", yaxis="y2", 
             marker = list(color="black")) %>%
   layout(yaxis = list(type = "log", tickvals = axseq, 
                       ticktext = as.character(axseq), 
                       zeroline=F, showline=T, ticks="outside", 
                       ticklen=8, showgrid=T),
          yaxis2 = list(type="log", tickvals=minTickLoc, 
                        ticktext=rep("", length(minTickLoc)), 
                        zeroline=F, showline=F, ticks="outside", 
                        ticklen=3, showgrid=T),
          xaxis = list(showline=T, ticks="outside", ticklen=8))

主要和次要的标记与情节

2 个答案: