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In fields such as high-energy physics, ROOT is used for analysis. In addition to the base installation, there is a package called 'PyROOT' that allows one to to use ROOT from Python. In addition, there is one called 'rootpy', which allows one to use ROOT in a more Pythonic way.
This guide is not my own work. The credit goes to the original author Taku Yamanaka from Osaka University. This installation guide was modeled from his original instructions that I have translated and to which I have added additional explanations.
In order to make ROOT run, one needs a C++ compiler. The 'command line tools' are not enough. Rather, you will need Xcode, otherwise you will get errors. If you do not have Xcode, the following instructions will install it:
- Inside of the 'Application' folder, start-up the App Store and download Xcode.
- If you then start-up Xcode from the Application Folder, any necesary components will be installed.
- You may close Xcode.
Next, ROOT will need to be installed.
CERN ROOT is a powerful framework, a C library for processing and manipulating data. The library setup and use might seem a little overwhelming for a beginner level computer user because. Jan 16, 2014 $ brew tap homebrew/science # then, simply install ROOT, enableing the Cocoa interface, $ brew install -with-cocoa root ROOT is now fully compatible with Marverick from version 5.34/13. Mac os x mountain lion 10.8 5 dmg download.
- We'll begin by downloading ROOT and putting it in a folder labeled with the version number under the directory '~/local/root'
- From CERN's ROOT download page first choose the Pro version and then select the Mac OS X Binary (.tar.gz). In the example below, the 10.12 version was downloaded. Places where your version may differ are indicated in italics.
- Double click the root_v6.12.06.macosx64-10.12-clang90.tar.gz file in the Downloads folder.
- Unpack the 'root' folder from the zipped file. It will have folders such as 'aclocal' and 'bin' as subdirectories. After extracting this 'root' folder, rename it to include the version name. Here, it has been renamed root_v6.12.06.Curser finding has also been made easier as rubbing and shaking the tracking pad could bring the pointer in action, which is a useful feature for those who use the cursor so frequently for demonstration or when there are multiple monitors connected to a system. Where to download osx.dmg. Visual improvements and photo editing had also been taken to a next step by allowing third party applications to get some room for new extensions.
- Under '~/local' create a new folder called 'root'.
- Move the previously extracted and renamed folder root_v6.12.06 out of your Downloads folder and into the new '~local/root' directory.
- Create a symbolic link to '~/local/root/pro'
Open Terminal and input the following commands, modifying as per necessary to account for the version you are using. Even if you receive an error saying that 'pro' does not exist, ignore it.Because a symbolic link has been created, from this point on '~/local/root/pro' will function as the ROOT directory. If you install ROOT with this method, it will be easy to try out and install different versions of ROOT or to restore an old version. If you want to use another version, perform the same steps outlined above. This includes the Terminal commands listed in this step. These point the 'pro' symbolic link to the new version's folder that you will have extracted and renamed 'root_vX_XX_XX' or the like. - Configure the necessary environment variables
In the ~/.bash_profile file, add the following line:This does not have to be done if you switch versions of ROOT in the manner described above, only the symbolic link must be changed, as described above. - Close the old Terminal window and open a new one for the changes to take effect.
- From the new Terminal window, input the following commands. ROOT will start, and a graphic should be drawn.
Just like in Step II.3 above, we may configure the PYTHONPATH environment variable. In doing so, ROOT will be able to be used inside of Python. If one is using a distribution like Enthought Python or Anaconda, then an error message like the following may be given.
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Therefore, use the standard Mac OS X installation of Python (/usr/bin/python). For example,