[R-sig-Geo] Adding colour to polylines in Leaflet

[Dhiraj Khanna]

@Kent they are appearing as three separate lines. I am hoping to see them
joint with no gaps. The transition from row 4 to row 5 is where the speed
has changed from 2.1 knots to 3.4 knots. I am hoping to see another line
from row 4 to row 5 in red colour. Similarly for the other disjoint points.
Regards

Dhiraj Khanna
Mob:09873263331


On Sat, Sep 1, 2018 at 6:17 PM Kent Johnson <kent3737 using gmail.com> wrote:

> Message: 5
>> Date: Sat, 1 Sep 2018 08:28:24 +0530
>> From: Dhiraj Khanna <dhirajkhanna using gmail.com>
>> To: r-sig-geo using r-project.org
>> Subject: [R-sig-Geo] Adding colour to polylines in Leaflet
>> Message-ID:
>>         <
>> CANHhK329-Y7hPJD9gSOs24mSqGkrjC481oQspNAgVisAw2JBoQ using mail.gmail.com>
>> Content-Type: text/plain; charset="utf-8"
>>
>> I am working with shipping data where I get the dynamic parameters of a
>> ship like its position, speed, heading and rate of turn. I am then trying
>> to plot this on a leaflet map and trying to colour the polylines based on
>> the speed, but it always shows up in the same colour. Here’s some sample
>> data:
>>
>> <snip>
>> This is the code I have tried which doesn’t work:-
>>
>> map <-  leaflet(x) map <- addTiles(map) for( Color in
>> levels(as.factor(x$Color))){   map <- addPolylines(map,
>> lng=~lon,lat=~lat,data=x[x$Color==Color,], color=~Color) } map
>>
>> Regards
>> Dhiraj Khanna
>> Mob:09873263331
>
>
> What are you expecting to see? When I run your code I get a map with three
> lines, one red, one orange and one yellow.
>
> Kent
>
>

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