Multhist包的直方图

Question

我在这里添加了一个数据子集。我有三个向量如下：

   c1<- c(-0.752828459121719, -0.706604166599532, 0.41692675932805, -0.367361148236791, 
  -0.444856002001598, 0.0900489872320513, 0.468315685498606, -0.464037640553016, 
  -0.846707525111339, -0.506632302047084)

   c2<-c(-0.228923493559715, -0.42723511806437, -0.238069534709052, 0.294663044558574, 
 -0.167947363700495, 0.384663250370909, -0.576133689238721, 0.391568870938566, 
 -0.1713203525461, 0.137870084258999, -0.56998356645267, -0.79334893711356, 
 -0.255524488425102, -0.0836927043466483, 0.98138909501453, -0.0762620826749111, 
  0.276135990737646, 0.0967624538454235)

  c3<-c(0.614217318387036, -0.678156662533459, 0.984482342663281, -0.733498306613966, 
-0.827978692596204, 0.893020146193421, 0.622541843393445, 0.349300942014951,        0.323917293456244, 0.715438132732889, -0.223319925026617, 0.660588831775187, 
  -0.234554629428742, -0.0923738721559019, -0.124609065879424, 
  -0.448912579628426, -0.961918202616368, -0.117716470119246, -0.62850739905694, 
   0.532566335430782, -0.782123992693959)

使用multhist包，

 l<-list(c1,c2,c3)

 multhist(l, col=c("red","green","blue"))

我获得了直方图

但我想将X轴范围从-1更改为+1（中断为0.1），以便我可以清楚地显示值为-1，-0.9，-0.8，-0.7等等直到+1。即使已经从stackoverflow（How to set xlim in multhist?）

中跟随以下问题，我也无法做到