[R] change the height or scale of the y axis

[legen]

Hi, Jim,

Thank you for your reply. I just want to increase the height of y axis in
the second plot in order to show all the indices (x1, x2, ...). Can you help
me? Thank you again.

Legen



Jim Lemon-2 wrote:
> 
> legen wrote:
>> Hallo, All,
>>
>> I have a question about changing the height or scale of the y axis. When
>> I
>> use following two R codes, I can get two plots. Please look at the y
>> axes,
>> the number of indices (x1, x2, …) on the y axis in the first plot is
>> smaller
>> than that in the second plot, and hence the space between any two indices
>> in
>> the first plot is wider than that in the second plot. As the number of
>> indices increases, the space will vanish and the indices will overlap. I
>> want to display all the indices on the y axis in the second plot, just
>> look
>> like that in the first plot. How to separate the indices on the y axis in
>> the second plot? I guess maybe changing the height or scale of y axis is
>> a
>> way to solve my problem, but I failed to do it after several trails.
>> Anybody
>> can help me? Thank you in advance.
>>
>> Legen
>>
>> The first R code:
>> x<-c("x1","x2","x3","x4","x5","x6","x7","x8","x9","x10")
>> y<-sample(0:100,10,replace=F)
>> d<-data.frame(y)
>> rownames(d)<-x
>> r<-nrow(d)
>> i<-1:r
>> plot(d$y,i,xlab="",ylab="",axes=F)
>> axis(1)
>> axis(2,at=i,labels=x)
>>
>> The second R code:
>> x<-c("x1","x2","x3","x4","x5","x6","x7","x8","x9","x10",
>>      "x11","x12","x13","x14","x15","x16","x17","x18","x19","x20",
>>      "x21","x22","x23","x24","x25","x26","x27","x28","x29","x30",
>>      "x31","x32","x33","x34","x35","x36","x37","x38","x39","x40",
>>      "x41","x42","x43","x44","x45","x46","x47","x48","x49","x50",
>>      "x51","x52","x53","x54","x55","x56","x57","x58","x59","x60",
>>      "x61","x62","x63","x64","x65","x66","x67","x68","x69","x70",
>>      "x71","x72","x73","x74","x75","x76","x77","x78","x79","x80",
>>      "x81","x82","x83","x84","x85","x86","x87","x88","x89","x90",
>>      "x91","x92","x93","x94","x95","x96","x97","x98","x99","x100",
>>     
>> "x101","x102","x103","x104","x105","x106","x107","x108","x109","x110",
>>     
>> "x111","x112","x113","x114","x115","x116","x117","x118","x119","x120",
>>     
>> "x121","x122","x123","x124","x125","x126","x127","x128","x129","x130",
>>     
>> "x131","x132","x133","x134","x135","x136","x137","x138","x139","x140",
>>     
>> "x141","x142","x143","x144","x145","x146","x147","x148","x149","x150",
>>     
>> "x151","x152","x153","x154","x155","x156","x157","x158","x159","x160",
>>     
>> "x161","x162","x163","x164","x165","x166","x167","x168","x169","x170",
>>     
>> "x171","x172","x173","x174","x175","x176","x177","x178","x179","x180",
>>     
>> "x181","x182","x183","x184","x185","x186","x187","x188","x189","x190",
>>     
>> "x191","x192","x193","x194","x195","x196","x197","x198","x199","x200")
>> y<-sample(0:300,200,replace=F)
>> d<-data.frame(y)
>> rownames(d)<-x
>> r<-nrow(d)
>> i<-1:r
>> plot(d$y,i,xlab="",ylab="",axes=F)
>> axis(1)
>> axis(2,at=i,labels=x)
>>
>>   
> Hi legen,
> Your problem centers about the fact that you have about 3 times the 
> vertical scale on the second plot and 20 times the number of ticks and 
> labels. You could make the second plot 3 times the height of the first 
> one, and you would get approximately the same spacing of equal 
> intervals, but the intervals on the second plot are likely to be about 
> 1.5 times those of the first. I can't work out why you are trying to do 
> what you say you want to do. Maybe some more explanation would help.
> 
> Jim
> 
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> 

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