.. DO NOT EDIT.
.. THIS FILE WAS AUTOMATICALLY GENERATED BY SPHINX-GALLERY.
.. TO MAKE CHANGES, EDIT THE SOURCE PYTHON FILE:
.. "auto_examples/quickflat/plot_zoom_to_roi.py"
.. LINE NUMBERS ARE GIVEN BELOW.

.. only:: html

    .. note::
        :class: sphx-glr-download-link-note

        :ref:`Go to the end <sphx_glr_download_auto_examples_quickflat_plot_zoom_to_roi.py>`
        to download the full example code.

.. rst-class:: sphx-glr-example-title

.. _sphx_glr_auto_examples_quickflat_plot_zoom_to_roi.py:


=================================
Plotting a zoomed view of one ROI
=================================

Sometimes it is useful to create a flatmap that is zoomed in one just a single
ROI. The location of the ROI can be inferred automatically, making it easy to
show just the region around that ROI.

.. GENERATED FROM PYTHON SOURCE LINES 11-45



.. rst-class:: sphx-glr-horizontal


    *

      .. image-sg:: /auto_examples/quickflat/images/sphx_glr_plot_zoom_to_roi_001.png
         :alt: plot zoom to roi
         :srcset: /auto_examples/quickflat/images/sphx_glr_plot_zoom_to_roi_001.png
         :class: sphx-glr-multi-img

    *

      .. image-sg:: /auto_examples/quickflat/images/sphx_glr_plot_zoom_to_roi_002.png
         :alt: plot zoom to roi
         :srcset: /auto_examples/quickflat/images/sphx_glr_plot_zoom_to_roi_002.png
         :class: sphx-glr-multi-img


.. rst-class:: sphx-glr-script-out

 .. code-block:: none

    ** (inkscape:4893): WARNING **: 21:54:50.013: Failed to wrap object of type 'GtkRecentManager'. Hint: this error is commonly caused by failing to call a library init() function.
    Generating a flatmap cache
    ** (inkscape:4925): WARNING **: 21:55:18.319: Failed to wrap object of type 'GtkRecentManager'. Hint: this error is commonly caused by failing to call a library init() function.






|

.. code-block:: Python

    # sphinx_gallery_thumbnail_number = 2

    import cortex
    import numpy as np
    np.random.seed(1234)
    from matplotlib import pyplot as plt

    def zoom_to_roi(subject, roi, hem, margin=10.0):
        roi_verts = cortex.get_roi_verts(subject, roi)[roi]
        roi_map = cortex.Vertex.empty(subject)
        roi_map.data[roi_verts] = 1
    
        (lflatpts, lpolys), (rflatpts, rpolys) = cortex.db.get_surf(subject, "flat",
                                                                    nudge=True)
        sel_pts = dict(left=lflatpts, right=rflatpts)[hem]
        roi_pts = sel_pts[np.nonzero(getattr(roi_map, hem))[0],:2]
    
        xmin, ymin = roi_pts.min(0) - margin
        xmax, ymax = roi_pts.max(0) + margin
        plt.axis([xmin, xmax, ymin, ymax])

    # Create dataset
    data = cortex.Volume.random('S1', 'fullhead')

    # Plot it using quickflat
    cortex.quickshow(data)

    # Zoom on just one region
    zoom_to_roi('S1', 'AC', 'left')

    # notice that the quality of this figure is now quite poor/grainy
    # we can improve this by changing the 'height' argument to quickflat

    cortex.quickshow(data, height=2048)
    zoom_to_roi('S1', 'AC', 'left')

.. rst-class:: sphx-glr-timing

   **Total running time of the script:** (0 minutes 35.574 seconds)


.. _sphx_glr_download_auto_examples_quickflat_plot_zoom_to_roi.py:

.. only:: html

  .. container:: sphx-glr-footer sphx-glr-footer-example

    .. container:: sphx-glr-download sphx-glr-download-jupyter

      :download:`Download Jupyter notebook: plot_zoom_to_roi.ipynb <plot_zoom_to_roi.ipynb>`

    .. container:: sphx-glr-download sphx-glr-download-python

      :download:`Download Python source code: plot_zoom_to_roi.py <plot_zoom_to_roi.py>`

    .. container:: sphx-glr-download sphx-glr-download-zip

      :download:`Download zipped: plot_zoom_to_roi.zip <plot_zoom_to_roi.zip>`


.. only:: html

 .. rst-class:: sphx-glr-signature

    `Gallery generated by Sphinx-Gallery <https://sphinx-gallery.github.io>`_