[R] the same function returning different values when called differently..

[Eric Berger]

Hi Akshay,
Presumably PFC.NS and snl[[159]] are not exactly the same.
You can start by trying to determine if (and then how) they differ.
e.g.
> identical(PFC.NS, snl[[159]])
presumably this will result in FALSE

then compare
> class(PFC.NS)
> class(snl[[159]])

etc

HTH,
Eric


On Wed, Mar 14, 2018 at 1:42 PM, akshay kulkarni <akshay_e4 at hotmail.com>
wrote:

> dear members,
>
>  I have a function ygrpc which acts on the daily price increments of a
> stock. It returns the following values:
>
>
>  ygrpc(PFC.NS,"h")
>  [1]  2.149997  1.875000  0.750000  0.349991  2.100006  0.199997
> 4.000000  2.574996  0.500000  0.349999  1.500000  0.700001
> [13]  0.500000  1.300003  0.449997  2.800003  2.724998 66.150002
> 0.550003  0.050003  1.224991  4.899994  1.375000  1.574997
> [25]  1.649994  0.449997  0.975006  2.475006  0.125000  2.625000
> 3.649994  0.399994  1.300003  2.074997  1.025001  0.125000
> [37]  3.849999  0.025002  0.824997  1.750000  1.699997  1.750000
> 1.699997  0.275002  2.300003  0.349998  0.750000  0.224998
> [49]  0.125000  1.475006  1.599998  0.125000  0.500000  0.700005
> 1.099998  0.225006  1.274997  1.300003  3.000000  0.300003
> [61]  0.724999  3.699997  2.424995  8.425003  1.099991  2.025009
> 0.850006  4.000000  1.724991  0.949997  1.825012  2.799988
> [73]  0.425003  1.799995  5.700005  2.125000  0.125000  4.000000
> 2.350006  1.524994  1.299995  0.300003  0.949997  0.449997
> [85]  1.899994  1.700005  1.150009  0.849998  2.449997  5.300003  0.19999
>
> I also have a list of stocks called "snl" with snl[[159]] pointing to
> PFC.NS (above):
> tail(snl[[159]])
>            PFC.NS.Open PFC.NS.High PFC.NS.Low PFC.NS.Close PFC.NS.Volume
> PFC.NS.Adjusted
> 2018-03-07       98.40       98.45       95.1        95.30       7854861
>          95.30
> 2018-03-08       94.90       94.95       89.3        91.90      12408061
>          91.90
> 2018-03-09       92.00       94.50       91.9        93.10       7680222
>          93.10
> 2018-03-12       93.40       93.85       86.1        88.25      12617833
>          88.25
> 2018-03-13       89.20       91.85       86.2        89.85      12792630
>          89.85
> 2018-03-14       88.65       89.30       86.1        86.70      16406495
>          86.70
>
> But ygrpc(snl[[159]],"h") returns :
> ygrpc(snl[[159]],"h")
> [1] 1
>
> Can you please shed some light on what is happening?
>
> Very many thanks for your time and effort....
>
> Yours sincerely
> AKSHAY M KULKARNI
>
>
>
>
>
>
>
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>
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