IO package: Difference between revisions
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→Matlab compatibility
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*:Matlab's xlsread ignores all non-numeric data values outside the smallest rectangle encompassing all numerical values. Octave's xlsread doesn't. This means that Matlab ignores all row/column headers, not very user-friendly IMO. | *:Matlab's xlsread ignores all non-numeric data values outside the smallest rectangle encompassing all numerical values. Octave's xlsread doesn't. This means that Matlab ignores all row/column headers, not very user-friendly IMO. | ||
** When using the Java interface, reading and writing xls-files by octave-forge is platform-independent. On systems w/o installed Excel, Matlab can only read Excel 95 formatted .xls files (written using ML xlswrite's 'Basic" option) – and then differently than under Windows..... | ** When using the Java interface, reading and writing xls-files by octave-forge is platform-independent. On systems w/o installed Excel, Matlab can only read Excel 95 formatted .xls files (written using ML xlswrite's 'Basic" option) – and then differently than under Windows..... | ||
** Matlab's xlsread returns strings for cells containing date values. This makes for endless if-then-elseif-else-end constructs to catch all expected date | ** Matlab's xlsread returns strings for cells containing date values. This makes for endless if-then-elseif-else-end constructs to catch all expected date formats. Octave returns numerical data (where 0 = 1/1/1900 – you can easily transfer them into proper octave date values yourself using e.g. datestr(), see bottom of this document for more info). For dates before 1/1/1900, Octave returns dates as text strings. | ||
** Matlab's xlsread invokes csvread if no Excel interface is present. Octave-forge's xlsread doesn't. | ** Matlab's xlsread invokes csvread if no Excel interface is present. Octave-forge's xlsread doesn't. | ||
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* xlsfinfo | * xlsfinfo | ||
** When invoking Excel/COM interface, octave-forge's xlsfinfo also echoes the type of sheet (worksheet, chart), not just the sheet names. Using Java I haven't found similar functionality (yet). | ** When invoking Excel/COM interface, octave-forge's xlsfinfo also echoes the type of sheet (worksheet, chart), not just the sheet names. Using Java I haven't found similar functionality (yet). | ||
=== Comparison of interfaces & usage === | === Comparison of interfaces & usage === | ||