I got really frustrated when trying to convert my charts and excel worksheets into publishable content for my paper. Went through several stack overflow questions and used ghostscript to make it possible.
All softwares used in this post are free — $0. It is ideal for Ph.D students or home use for publishing.
Install ghostscript, using homebrew just run brew install GhostScript and you are good.
Install Gimp. From homebrew all you have to do is: brew install Caskroom/cask/gimp
Open your excel worksheet. Set the page setup to be vertical or horizontal, select your area as print area, and then save as pdf. Make sure you save the workbook as pdf. E.g. now I have saved the workbook to be figure1.pdf
In your command line, type gs -q -dSafer -dBatch -dNOPAUSE -sDEVICE=tiff32nc -r300 -sOutputFile=figure1.tif figure1.pdf -c quit
Open the figure1.tif in Gimp, select the area you want, and then choose image -> fit canvas to selection
In file->export as simple export the file as figure1.tiff you are all set. If you look at the properties it has 300dpi.
You can easily use bash to do batch processing for pdf files, but for more accurate image selection you still need gimp.
Tried to push a project onto github and faced sooooooo much annoying errors.
1. Use ssh instead of https ssh-keygen -t rsa -C "firstname.lastname@example.org"
2. Press enter all the way until the end.
3. Vi into your public key usually at ~/.ssh/id_rsa.pub
4. copy all text from public key and put it into your github account settings–ssh keys.
5. push using ssh you should be all set and you should not see any of the errors again.