[R] long character string problem

[toby909 at gmail.com]

Yes parse(text=) is what I was looking for. thanks. (I also fixed the missing 
operator).

I will feed this entire expression to the deriv() function.

T


Stephen Tucker wrote:
> I think you are looking for 
> fct <- c(parse(text=cum1),parse(text=cum2))
> 
> although you need to include operators before your A coefficients (for
> example,
> 
> ...C11)A12*...
> 
> 
> 
> 
> --- toby909 at gmail.com wrote:
> 
> 
>>Hi All
>>
>>I am having 2 very long character strings (550chars) and I want to put them
>>as 
>>expressions together with c(). The problem is that I also get these 
>>double-quotes, as seen below in 'fct'. How can I remove these
>>double-quotes? I 
>>tried as.name() but it did not work (because of size?). These are creating 
>>trouble with subsequent programs, which I tested with strings that for some
>>
>>reason do not have these double quotes (see very bottom).
>>
>>
>>
>>
>>
>> > cum1
>>[1] 
>>
> 
> "A11*(X11*x1+X21*x2)+1*sqrt(B11*(X11*x1+X21*x2)^2+C11)A12*(X12*x1+X22*x2)+1*sqrt(B12*(X12*x1+X22*x2)^2+C12)A13*(X13*x1+X23*x2)+-1*sqrt(B13*(X13*x1+X23*x2)^2+C13)A14*(X14*x1+X24*x2)+-1*sqrt(B14*(X14*x1+X24*x2)^2+C14)A15*(X15*x1+X25*x2)+1*sqrt(B15*(X15*x1+X25*x2)^2+C15)A16*(X16*x1+X26*x2)+1*sqrt(B16*(X16*x1+X26*x2)^2+C16)A17*(X17*x1+X27*x2)+1*sqrt(B17*(X17*x1+X27*x2)^2+C17)A18*(X18*x1+X28*x2)+1*sqrt(B18*(X18*x1+X28*x2)^2+C18)A19*(X19*x1+X29*x2)+-1*sqrt(B19*(X19*x1+X29*x2)^2+C19)A110*(X110*x1+X210*x2)+1*sqrt(B110*(X110*x1+X210*x2)^2+C110)"
> 
>> > cum2
>>[1] 
>>
> 
> "A21*(X11*x1+X21*x2)+1*sqrt(B21*(X11*x1+X21*x2)^2+C21)A22*(X12*x1+X22*x2)+1*sqrt(B22*(X12*x1+X22*x2)^2+C22)A23*(X13*x1+X23*x2)+-1*sqrt(B23*(X13*x1+X23*x2)^2+C23)A24*(X14*x1+X24*x2)+-1*sqrt(B24*(X14*x1+X24*x2)^2+C24)A25*(X15*x1+X25*x2)+1*sqrt(B25*(X15*x1+X25*x2)^2+C25)A26*(X16*x1+X26*x2)+1*sqrt(B26*(X16*x1+X26*x2)^2+C26)A27*(X17*x1+X27*x2)+1*sqrt(B27*(X17*x1+X27*x2)^2+C27)A28*(X18*x1+X28*x2)+1*sqrt(B28*(X18*x1+X28*x2)^2+C28)A29*(X19*x1+X29*x2)+-1*sqrt(B29*(X19*x1+X29*x2)^2+C29)A210*(X110*x1+X210*x2)+1*sqrt(B210*(X110*x1+X210*x2)^2+C210)"
> 
>> > fct = c(as.expression(cum1), as.expression(cum2))
>> > fct
>>
> 
> expression("A11*(X11*x1+X21*x2)+1*sqrt(B11*(X11*x1+X21*x2)^2+C11)A12*(X12*x1+X22*x2)+1*sqrt(B12*(X12*x1+X22*x2)^2+C12)A13*(X13*x1+X23*x2)+-1*sqrt(B13*(X13*x1+X23*x2)^2+C13)A14*(X14*x1+X24*x2)+-1*sqrt(B14*(X14*x1+X24*x2)^2+C14)A15*(X15*x1+X25*x2)+1*sqrt(B15*(X15*x1+X25*x2)^2+C15)A16*(X16*x1+X26*x2)+1*sqrt(B16*(X16*x1+X26*x2)^2+C16)A17*(X17*x1+X27*x2)+1*sqrt(B17*(X17*x1+X27*x2)^2+C17)A18*(X18*x1+X28*x2)+1*sqrt(B18*(X18*x1+X28*x2)^2+C18)A19*(X19*x1+X29*x2)+-1*sqrt(B19*(X19*x1+X29*x2)^2+C19)A110*(X110*x1+X210*x2)+1*sqrt(B110*(X110*x1+X210*x2)^2+C110)",
> 
>>
>> 
>>
> 
> "A21*(X11*x1+X21*x2)+1*sqrt(B21*(X11*x1+X21*x2)^2+C21)A22*(X12*x1+X22*x2)+1*sqrt(B22*(X12*x1+X22*x2)^2+C22)A23*(X13*x1+X23*x2)+-1*sqrt(B23*(X13*x1+X23*x2)^2+C23)A24*(X14*x1+X24*x2)+-1*sqrt(B24*(X14*x1+X24*x2)^2+C24)A25*(X15*x1+X25*x2)+1*sqrt(B25*(X15*x1+X25*x2)^2+C25)A26*(X16*x1+X26*x2)+1*sqrt(B26*(X16*x1+X26*x2)^2+C26)A27*(X17*x1+X27*x2)+1*sqrt(B27*(X17*x1+X27*x2)^2+C27)A28*(X18*x1+X28*x2)+1*sqrt(B28*(X18*x1+X28*x2)^2+C28)A29*(X19*x1+X29*x2)+-1*sqrt(B29*(X19*x1+X29*x2)^2+C29)A210*(X110*x1+X210*x2)+1*sqrt(B210*(X110*x1+X210*x2)^2+C210)")
> 
>> >
>>
>>
>>
>>
>>
>>
>>
>>
>> > fct = c(expression(2*x1^3-7*x2^2-9), expression(x1^2-x2^3+1))
>> > fct
>>expression(2 * x1^3 - 7 * x2^2 - 9, x1^2 - x2^3 + 1)
>>
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>>
> 
> 
> 
> 
> 
>  
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