Upper bands and lower bands

I explain better:

I have this percentage z<-1/(n*365) where n=20 so z is
0,000136986

Imagine: a matrix with length(n*365) so that

matrix result is

resultc(
1,
1-z
result previous row-z
result previous row-z
....
0)

If I plot this is a linear decreasing line

I want to plot an upper line wich is 10% higher tan resultc on the first
values and then decreasing so that last value will be 0.05.
 the same in the lower, a line which values are at the beggining a 10%
lower and smoothly dreasing values till the last will be 5% lower.

Is it posible to make thins bands exponencially with a code?





2017-06-01 20:20 GMT+02:00 Pedro p?ramo <percentil101 at gmail.com>:

Hi all

I want to add a band of fluctuaci?n (exponential decreading) to a linear
deacrecing values

Imagine: I have a matrix like c(10,9,8,7,6,5,4,3,2,1)

The thing is I want  two new lines so that the m?ximum value of the new
colum on the m?ximum is from 10% to 5% higher and the same lower for the
m?nimum

the final two matix will be something like

c(10+0.10*10,9+0.089*9,8+0.075*8.....,1+0.05*1)
c(10-0.10*10,9-0.09*9,8-0.075*8.....,1-0.05*1)

What I?m looking for is a function tu calculate de "values, weights" so
that including the 10% and 5% and the nunmber of decreasing values, in this
case n=10, calculates de smotth weigths.

I don?t know if I have expalined well so thar finally putting initial
value final and periods I can find a matrix like

g(0.1,0.89,0.79,0.075,...,0.05)

Exists something like that?

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