Retrievable results in a procedure

I would like to suppressed printing of retrievable results in a
procedure and to print only when retrieved.

In line 10 below I call procedure "try" and get matrices A,B,C all
printed upon a call to the procedure. I get around this unwanted
printing by calling with v<-try(A,B) as in line 11.

Any way to suppress printing of the retrievable results listed in the
structure command? Thank you, and Merry Christmas to all.


A<-matrix(rpois(16,lambda=5),nrow=4,byrow=T)
B<-diag(4)

try<-function(A,B){
  C<-A+B
  cat("\nC:\n"); print(C)
structure(list(A=A,B=B,C=C))
}

try(A,B)    # line 10
v<-try(A,B) # line 11

--
styen at ntu.edu.tw (S.T. Yen)


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I would like to suppressed printing of retrievable results in a 
procedure and to print only when retrieved.

In line 10 below I call procedure "try" and get matrices A,B,C all 
printed upon a call to the procedure. I get around this unwanted 
printing by calling with v<-try(A,B) as in line 11.

Any way to suppress printing of the retrievable results listed in the 
structure command? Thank you, and Merry Christmas to all.


A<-matrix(rpois(16,lambda=5),nrow=4,byrow=T)
B<-diag(4)

try<-function(A,B){
 C<-A+B
 cat("\nC:\n"); print(C)
structure(list(A=A,B=B,C=C))
}

try(A,B)    # line 10
v<-try(A,B) # line 11

I'm a bit confused about what you actually want, but I think 
invisible() might be the answer.

Note that there's already a base function try() so that's not a great 
name for test functions.

Sarah

On Tue, Dec 25, 2018 at 8:47 AM Steven Yen <styen at ntu.edu.tw 
<mailto:styen at ntu.edu.tw>> wrote:

    I would like to suppressed printing of retrievable results in a
    procedure and to print only when retrieved.

    In line 10 below I call procedure "try" and get matrices A,B,C all
    printed upon a call to the procedure. I get around this unwanted
    printing by calling with v<-try(A,B) as in line 11.

    Any way to suppress printing of the retrievable results listed in the
    structure command? Thank you, and Merry Christmas to all.


    A<-matrix(rpois(16,lambda=5),nrow=4,byrow=T)
    B<-diag(4)

    try<-function(A,B){
      C<-A+B
      cat("\nC:\n"); print(C)
    structure(list(A=A,B=B,C=C))
    }

    try(A,B)    # line 10
    v<-try(A,B) # line 11

    -- 
    styen at ntu.edu.tw <mailto:styen at ntu.edu.tw> (S.T. Yen)


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