 Usage:  z = string (fmt, v1 {, v2 {, v3 {, v4 {, v5}}}})   
 
 Input:

  fmt                    formatstring 
                         
                         
  vi                     n x 1 vector 
                         
                         
 Output:

  z                      n x 1 string vector 
                         
                         
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(C) MD*TECH Method and Data Technologies, 17.8.2000
