Re: [igraph] plot.igraph and x-axis

[Frederik Elwert]

Just as a side note: layout.norm might be interesting for you. It 
allows to scale an existing layout with given contraints. You can then 
use the normalized layout to plot it.

Frederik

Am Di 26 Nov 2013 16:40:50 CET schrieb Gábor Csárdi:
> On Tue, Nov 26, 2013 at 10:26 AM, Hermann Norpois <address@hidden> wrote:
>> I am sorry I did not get it.
>> If I use rescale=FALSE my plot is empty.
>
> You also need to set the xlim and ylim parameters, because that also
> defaults to (-1,1).
>
>> Actually I would like to change the rescale parameters. Is that possible,
>> i.e.
>> rescaleparameters = V(gs)$x
>
> No, that's not possible. Rescale the layout for yourself, and then set
> these limits in xlim and ylim.
>
> Btw. if you include code this way, that is somewhat a pain to try,
> because the > prompt makes it impossible to copy and paste. It is best
> to include some code that we can just copy and paste into R, without
> needing to edit it in emacs.
>
> G.
>
>> My try:
>> plot (gs, vertex.size=2, vertex.label=NA,rescale=FALSE, edge.width=
>> (E(gs)$weight)^6, layout=cbind (V(gs)$x, V(gs)$y))
>>
>>> dput (gs)
>> structure(list(2, FALSE, 1, 0, 0, 0, c(0, 0, 1), c(0, 1, 1),
>>     list(c(1, 0, 1), structure(list(), .Names = character(0)),
>>         structure(list(name = c("rs744016", "rs763273"), x = c(27042106L,
>>         27043594L), y = c(0.6445235948615, 0.6229189950958)), .Names =
>> c("name",
>>         "x", "y")), structure(list(weight = 0.986597, y = 0.7704755,
>>             color = "red"), .Names = c("weight", "y", "color"
>>         )))), class = "igraph")
>>> class (gs)
>> [1] "igraph"
>>>  plot (gs, vertex.size=2, vertex.label=NA,rescale=FALSE, edge.width=
>>> (E(gs)$weight)^6, layout=cbind (V(gs)$x, V(gs)$y))
>>> axis (1, at=1:10) # Does not change anything.
>>>  plot (gs, vertex.size=2, vertex.label=NA, edge.width= (E(gs)$weight)^6,
>>> layout=cbind (V(gs)$x, V(gs)$y))
>>>
>>
>>
>> 2013/11/26 Gábor Csárdi <address@hidden>
>>>
>>> Hi,
>>>
>>> no, this is an igraph thing, igraph rescales layouts to (-1, 1),
>>> unless you specify the rescale=FALSE:
>>>
>>> http://igraph.sourceforge.net/doc/R/plot.common.html
>>>
>>> Gabor
>>>
>>> On Tue, Nov 26, 2013 at 9:53 AM, Hermann Norpois <address@hidden>
>>> wrote:
>>>> Hello,
>>>>
>>>> I want to have an x-axis with x-values refering to V(g)$x.
>>>>
>>>> How does this work?
>>>>
>>>> I tried
>>>> axis (1, at=V(g)$x) without an effect.
>>>>
>>>> dput (axis (1)) has the following output:
>>>> c(-1, -0.5, 0, 0.5, 1)
>>>>
>>>> How can I change this? I guess it is more a classical R-question ...
>>>>
>>>> thanks
>>>> Hermann
>>>>
>>>>
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>>>
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>>
>>
>>
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