There are probably many mistakes with this code.  I am used to coding in C
with a debugger, so I am very new to coding in R without one and different
syntax. My code in the upper left panel of R Studio
isz<-c(3,1,4,5,2,1,0,3,5,8)zlength(z)y<-c(0,0,0,0,0,0,0,0,0,0)ylength(y)zdiff
= diff(z)zdiffn<-length(zdiff)nx<-zdifff<-function(x)         {           
for (k in 1:n){                for (i in 1:n-k){                  if
(all(x[i] * x[i-1] > 0) && ((x[i+k+1] * x[i+k]) < 0)                 
y[k]<-y[k]+1               }                         }       
return(y)}f(x)__________I get back > z [1] 3 1 4 5 2 1 0 3 5 8> length(z)[1]
10> y<-c(0,0,0,0,0,0,0,0,0,0)> y [1] 0 0 0 0 0 0 0 0 0 0> length(y)[1] 10>
zdiff = diff(z)> zdiff[1] -2  3  1 -3 -1 -1  3  2  3> n<-length(zdiff)> n[1]
9> x<-zdiff> > f<-function(x) +         {+             for (k in 1:n){+                
for (i in 1:n-k){+                   if (all(x[i] * x[i-1] > 0) &&
((x[i+k+1] * x[i+k]) < 0)+                   y[k]<-y[k]+1   Error:
unexpected symbol in:"                  if (all(x[i] * x[i-1] > 0) &&
((x[i+k+1] * x[i+k]) < 0)                  y">             }Error:
unexpected '}' in "            }">                 >          }Error:
unexpected '}' in "         }">         return(y)Error: no function to
return from, jumping to top level> }Error: unexpected '}' in "}"> f(x)Error
in if (all(x[i] * x[i - 1] > 0) && ((x[i + k + 1] * x[i + k]) <  :   missing
value where TRUE/FALSE needed_________Perhaps there is someway to use NULL
or NA?



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