M2SCI function
Last update : 07/05/2004

mtlb_isa - Matlab isa emulation function

### Description

There is no Scilab equivalent function for Matlab `isa` but some equivalent expressions can be used when the object "class" exists in Scilab.

The function `mtlb_isa(OBJ,class)` is used by `mfile2sci` to replace `isa(OBJ,class)` when it was not possible to know what were the inputs while porting Matlab code to Scilab. This function will determine the correct semantic at run time. If you want to have a more efficient code it is possible to replace `mtlb_isa` calls:

  - If `class` is equal to "logical", `mtlb_isa(OBJ,class)` may be replaced by `type(OBJ)==4`
  - If `class` is equal to "char", `mtlb_isa(OBJ,class)` may be replaced by `type(OBJ)==10`
  - If `class` is equal to "numeric", `mtlb_isa(OBJ,class)` may be replaced by `or(type(OBJ)==[1,5,8])`
  - If `class` is equal to "intX" (X being equal to 8, 16, or 32), `mtlb_isa(OBJ,class)` may be replaced by `typeof(OBJ)=="intX"`
  - If `class` is equal to "uintX" (X being equal to 8, 16, or 32), `mtlb_isa(OBJ,class)` may be replaced by `typeof(OBJ)=="uintX"`
  - If `class` is equal to "single", `mtlb_isa(OBJ,class)` may be replaced by `type(OBJ)==1`
  - If `class` is equal to "double", `mtlb_isa(OBJ,class)` may be replaced by `type(OBJ)==1`
  - If `class` is equal to "cell", `mtlb_isa(OBJ,class)` may be replaced by `typeof(OBJ)=="ce"`
  - If `class` is equal to "struct", `mtlb_isa(OBJ,class)` may be replaced by `typeof(OBJ)=="st"`
  - If `class` is equal to "function_handle", `mtlb_isa(OBJ,class)` may be replaced by `type(OBJ)==13`
  - If `class` is equal to "sparse", `mtlb_isa(OBJ,class)` may be replaced by `type(OBJ)==5`
  - If `class` is equal to "lti", `mtlb_isa(OBJ,class)` may be replaced by `typeof(OBJ)=="state-space"`

Caution: `mtlb_isa` has not to be used for hand coded functions.

### See Also

`type`, `typeof`,

### Authors

  V.C.