My aim is to post at least one article each month, taking a detailed look at some feature of MS Excel and how to use that feature in PhpSpreadsheet, or on how to perform different activities in PhpSpreadsheet. How to debug formulae that don't produce the expected result.The Next Article (currently Work in Progress): Advice on Iterating through the rows and cells in a worksheet.Īnd for Patrons at levels actively using PhpSpreadsheet:.A look at how MS Excel (and PhpSpreadsheet) handle date and time values.Posts already available to Patreon supporters: Supporters will receive access to articles about working with PhpSpreadsheet, and how to use some of its more advanced features. I am now running a Patreon to support the work that I do on PhpSpreadsheet. Please ask your support questions on StackOverflow, or have a quick chat on Gitter.
#LIBREOFFICE EXCEL INSTALL#
Read more about it, including install instructions, in the official documentation. Other file formats don't support writing Charts. They are not necessary to define charts for writing to Xlsx files.
#LIBREOFFICE EXCEL PDF#
One or the other of these libraries is necessary if you want to generate HTML or PDF files that include charts or to render a Chart to an Image format from within your code. or // to use mitoteam/jpgraph Settings:: setChartRenderer(\ PhpOffice\ PhpSpreadsheet\ Chart\ Renderer\ MtJpGraphRenderer::class) 7.// to use jpgraph/jpgraph Settings:: setChartRenderer(\ PhpOffice\ PhpSpreadsheet\ Chart\ Renderer\ JpGraph::class) Depending on the order of operands Calc and Excel fail differently. They don't only affect extreme values as chosen for the sample above but also normal 'allday' calculations. The deviations are mostly much smaller and go unnoticed as the results are rounded to 15 digits for display, but the 'value' of the cell is not corrected accordingly and the deviations may cause boosted errors in downstream calculations. Thus expect unpredictable 'fuzzy' results already in Calc itself. This may vary from function to function and is partly affected / broken by empty cells within the operand stack. for 'SUM' the first 'non-zero' summand is reserved and calculated last to spot a probability that a small result should be zero. The results of Calc still vary due to other influences, e.g. While the results are opposite (Calc wrong) for the following: the sum of this stack will be correct in Calc (0,52) but wrong in Excel (0,51953125): (there are differences between 'floating point math' and 'school math'! fp-math with limited precision is not! associative)Į.g. While excel works 'by row' first top row from left to right and than that downwards row by row.Īs the results of some operations sometimes depend on the order of operands, differences show up.
calculate sheets / ranges / operands in different orders: apply different rounding / 'snap-to-zero' to results, apply different rounding to input values, LibreOffice Calc and Microsoft Excel often compute slightly different results.Įxpect (often invisible) deviations between results from Calc and Excel as they: LibreOffice Calc cannot properly work with Microsoft Excel's xlsm files.
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