Export a graph at high quality

[gnappo]

Have you any suggestions on how to create a figure with high resolution (DPI) from a graph? 

I observed that exporting to eps, the figure is too large, when I convert it to to a jpg (I am using ghostscript). Se

[pauldavey]

DPI only has meaning when you print it on paper. If you view the image on a screen at 100%, you will see it pixel-for-pixel. You can modify the image's DPI in a program like Photoshop without changing the pixels, but the EPS should be just fine. Honestly if you want high quality, don't rasterise it (and certainly don't use JPG compression).

[wiebe@CARYA]

It's not clear what you want to achieve here...

You don't need to convert to eps to save to jpg, simply use get image method and save that pixmap to jpg (or better: png). LabVIEW's eps files are simply bmp's stored in eps, so you don't gain anything by storing as eps, there won't be vectors inside of them.

To get more pixels, simply make the graph bigger before getting the image, or make a bigger (off screen) graph and get it's image...

[Henrik_Volkers]

Copies of screens shouldn't be coded as jpg if png is available 🙂

Real high quality would be a vector based coding like svg, but I never tried to create it with LV. (maybe LV (data) to gnuplot ?)

[RTSLVU]

Well you can't really get any better image than LabVIEW exports unless you draw your own graph in Excel.

I recommend the XLR8 plug in it gives a lot more control and offers better Excel graphing capabilities than the LabVIEW Report Generation toolkit or as you see exporting a chart image. 

[Henrik_Volkers]

https://forums.ni.com/t5/Community-Documents/Interface-to-Graphics-Layout-Engine-GLE-to-create-publi...

That looks promising but no vector formats:

http://advancedplotting.github.io/docs/guide/start.html

[wiebe@CARYA]

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@RTSLVU wrote:

Well you can't really get any better image than LabVIEW exports unless you draw your own graph in Excel.

I recommend the XLR8 plug in it gives a lot more control and offers better Excel graphing capabilities than the LabVIEW Report Generation toolkit or as you see exporting a chart image. 

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I'll try that library at some point, would definitely solve some problems.

But would it help creating an image that's not in an Excel report? Excel was not mentioned before, although I guess it is an "export" format.

I've exported graphs before as vector drawings in PDF. 

[wiebe@CARYA]

And good old gnuplot has been making images from data for more then 3 decades.