CODEWITHSUNDEEP
f#
y0j0
y0j0

Reputation: 3592

SymbolicExpression - to string

I'm using RProvider in F# to calculate some statistics of my data. When I call R function it returns SymbolicExpression type but it is really difficult to parse data from this type. In my code I count quantiles like this 

let seq = R.seq(namedParams ["from", box 0;"to", box 1;"length", box 11;])
let quantiles = R.quantile(namedParams ["x", box dataWithoutNan1; "prob", box seq; "type", box 5;])

Then quantiles is of type SymbolicExpression.

val quantiles : SymbolicExpression =
            0%          10%          20%          30%          40%          50% 
0.000000e+00 3.203978e-03 5.366154e-03 1.101344e-02 8.259162e-02 4.533620e-01 
         60%          70%          80%          90%         100% 
1.278446e+00 2.706468e+00 4.927400e+00 1.141095e+01 8.944235e+02

SymbolicExpression type has member Value

let quantilesValue = quantiles.Value

and it is of type obj

val quantilesValue : obj =
  [|0.0; 0.003203978402; 0.00536615421; 0.01101343569; 0.08259161954;
    0.4533619823; 1.278445928; 2.706467538; 4.927399755; 11.41095162;
    894.4234507|]

What I trying to do is printing these values like

0.0; 0.003203978402; 0.00536615421; 0.01101343569; 0.08259161954; 0.4533619823; 1.278445928; 2.706467538; 4.927399755; 11.41095162; 894.4234507

I tried to cast these objects to Seq or to List but I was not able to do this. Any idea how to get values from SymbolicExpression in some simple way?

Upvotes: 1

Views: 89

Answers (1)

y0j0
y0j0

Reputation: 3592

These code works for this issue

let quantiles = R.quantile(namedParams ["x", box dataWithoutNan1; "prob", box seq; "type", box 5;]).GetValue<double[]>()

or

let quantiles = R.quantile(namedParams ["x", box dataWithoutNan1; "prob", box seq; "type", box 5;]).GetValue<list<double>>()

Upvotes: 1

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