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evstr
evaluates Scilab expressions and concatenates their results
Syntax
H = evstr(M) H = evstr(list(M, subExpr)) [H, ierr] = evstr(..)
Arguments
 M
single or vector or matrix of character strings: Scilab expressions to be evaluated and results to be concatenated.
 subExpr
vector of character strings: subexpressions to be preevaluated, defining quantities used in
M
expressions. H
single element, vector, or matrix of concatenated results.
 ierr
an integer, error indicator.
Description
Evaluates expressions set in M
. Then, concatenates their results
to build H
.
All expressions are assumed to yield results of compatible types and sizes with respect to their concatenation.
If the evaluation of M
expressions or the concatenation of their
results leads to an error, H = evstr(M)
yields the error as usual.
To avoid stopping to run next Scilab instructions,
[H, ierr] = evstr(M)
can be used to catch the error.
H
is then set to []
and ierr
returns 999
or another nonnull positive code.
If M
is provided through a list, Scilab expressions set in
subExpr
are evaluated before evaluating M
.
The results of these subexpressions must be referred to as %(k)
in M
, where k
is the subexpression's index in
subExpr
.

Special aliases:

Examples
a = 1; b = 2; Z = ['a', 'b'] ; evstr(Z) Z = list(['%(1)','%(1)%(2)'],['a+1','b+1']); evstr(Z) evstr('NaN'), evstr('Inf') //The two return values version [H, ierr] = evstr(Z) // no error Z = ['a', 'b', 'c'] ;// the variable c is undefined [H, ierr] = evstr(Z) // error 4: Undefined variable: c
See also
 execstr — execute Scilab code in strings
 sci2exp — converts an expression to a string
 strtod — parse and convert literal numbers STRings TO Decimal numbers
 concatenation — Concatenation. Recipients of an assignment. Results of a function
History
Version  Description 
5.3.0  "Nan" and "NaN" are now parsed as %nan .
"Inf" and "INF" are now parsed as %inf . 
6.0.1  Simple comments are now supported in almost all possible input expressions,
whatever is the shape of M . 
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