20. A system for displaying input code and output code corresponding to the input code, the system comprising: a textual input description including textual input code and a first set of textual cross-references associated with segments of the textual input code, each textual cross-reference including one or more textual identifiers for the associated segment of the textual input code, the textual input code being code written in a programming language for a technical computing environment; a textual output description including textual output code and a second set of textual cross-references associated with segments of the textual output code, each textual cross-reference including one or more textual identifiers for the associated segment of the textual output code, the textual output code being code generated from the textual input code into code for a programming language that is independent of technical computing environments; a processor configured to: identify a first cross-reference in the first set of cross-references associated with a segment of the input code, and search the second set of cross-references to identify a second cross-reference that matches the first cross-reference, the second cross-reference matching the first cross-reference when at least one identifier in the second cross-reference matches at least one identifier in the first cross-reference, the second cross-reference being associated with a segment of the output code that corresponds to the segment of the input code; and a display for showing the segment of the input code and the segment of the output code together.
20. A system for displaying input code and output code corresponding to the input code, the system comprising: a textual input description including textual input code and a first set of textual cross-references associated with segments of the textual input code, each textual cross-reference including one or more textual identifiers for the associated segment of the textual input code, the textual input code being code written in a programming language for a technical computing environment; a textual output description including textual output code and a second set of textual cross-references associated with segments of the textual output code, each textual cross-reference including one or more textual identifiers for the associated segment of the textual output code, the textual output code being code generated from the textual input code into code for a programming language that is independent of technical computing environments; a processor configured to: identify a first cross-reference in the first set of cross-references associated with a segment of the input code, and search the second set of cross-references to identify a second cross-reference that matches the first cross-reference, the second cross-reference matching the first cross-reference when at least one identifier in the second cross-reference matches at least one identifier in the first cross-reference, the second cross-reference being associated with a segment of the output code that corresponds to the segment of the input code; and a display for showing the segment of the input code and the segment of the output code together. 23. The system of claim 20 wherein the cross-references include line references to a line of the output code and a corresponding line of the input code.