.. DO NOT EDIT.
.. THIS FILE WAS AUTOMATICALLY GENERATED BY SPHINX-GALLERY.
.. TO MAKE CHANGES, EDIT THE SOURCE PYTHON FILE:
.. "11_demos\itom\plots\demo_drawMarkers.py"
.. LINE NUMBERS ARE GIVEN BELOW.

.. only:: html

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

        :ref:`Go to the end <sphx_glr_download_11_demos_itom_plots_demo_drawMarkers.py>`
        to download the full example code.

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

.. _sphx_glr_11_demos_itom_plots_demo_drawMarkers.py:

Draw markers
=================

In this example, you will learn how to mark points in ``1d`` or ``2d`` plots
with markers of varying shapes, colors and sizes. Multiple markers
can be set in one group with a corresponding name. It is also possible
to delete such groups using its name again.

For this feature, the designer plugin ``itom1dqwtplot`` and ``itom2dqwtplot``
have the slots ``plotMarkers`` and ``deleteMarkers``.

The slot ``deleteMarkers`` is defined as follows:

.. code-block:: python

    myPlot.call("deleteMarkers", groupname)

The slot ``plotMarkers`` is defined as follows:

.. code-block:: python

    myPlot.call("plotMarkers", points, style, groupname = "")

where:

* points is a 2xN ``dataObject`` with N points. The first row is the x-coordinate, the 2nd row the y-coordinate.
* style is defined as follows: ``r*20`` or ``r*20;2``, where ``r`` is the color, ``*`` \
 the shape and ``20`` the size of the shape in pixel. Optionally 2 is the line width.

Possible colors are:

== =======
b  blue
g  green
r  red
c  cyan
m  magenta
y  yellow
k  black
w  white
== =======

Possible shapes are:

== ===========================
.  point
o  ellipse
s  square
d  diamond
>  triangle, tip to the right
v  triangle, tip to the bottom
^  triangle, tip to the top
<  triangle, tip to the left
x  x-cross
\* star
\+ cross
h  hexagon
== ===========================

.. GENERATED FROM PYTHON SOURCE LINES 60-85

.. code-block:: Python


    import numpy as np
    from itom import dataObject
    from itom import plot

    # 1d sine
    sine = dataObject(np.sin(np.arange(0, 10 * np.pi, (1 / 20) * np.pi)))

    # 3d object with two different chessboards in both planes
    chessboard = dataObject.zeros([2, 1024, 1024], "uint8")
    color = 0
    for r in range(0, 1024, 64):
        color = 255 if color == 0 else 0  # invert color
        for c in range(0, 1024, 64):
            chessboard[0, r : r + 64, c : c + 64] = color
            color = 255 if color == 0 else 0  # invert color
    for r in range(0, 1024, 128):
        color = 255 if color == 0 else 0  # invert color
        for c in range(0, 1024, 128):
            chessboard[1, r : r + 128, c : c + 128] = color
            color = 255 if color == 0 else 0  # invert color

    [i1, h1] = plot(sine)
    [i2, h2] = plot(chessboard)








.. GENERATED FROM PYTHON SOURCE LINES 87-89

Mark all zero values of the sine with red stars (size: 20).
The name of this set of 11 points is called *zero-points*.

.. GENERATED FROM PYTHON SOURCE LINES 89-100

.. code-block:: Python


    zeros = dataObject.zeros([2, 11], "float32")
    for i in range(0, 11):
        zeros[0, i] = 20 * i
    h1.call("plotMarkers", zeros, "r*20", "zero-points")

    # in order to delete the set, call
    h1.call("deleteMarkers", "zero-points")
    # and set it again
    h1.call("plotMarkers", zeros, "r*20", "zero-points")








.. GENERATED FROM PYTHON SOURCE LINES 101-103

Mark all local maximas of the sine with green dots (size: 5).
The name of this set is *local-maximas*.

.. GENERATED FROM PYTHON SOURCE LINES 103-109

.. code-block:: Python

    maximas = dataObject.zeros([2, 5], "float32")
    for i in range(0, 5):
        maximas[1, i] = 1
        maximas[0, i] = 10 + 40 * i
    h1.call("plotMarkers", maximas, "gs5", "local-maximas")








.. GENERATED FROM PYTHON SOURCE LINES 110-112

.. image:: ../../_static/demoDrawMarkers_1.png
   :width: 100%

.. GENERATED FROM PYTHON SOURCE LINES 114-117

Put crosses at all corner points of the chessboard.
Please consider, that both chessboards in both planes have different
marker patterns.

.. GENERATED FROM PYTHON SOURCE LINES 117-130

.. code-block:: Python

    [X1, Y1] = np.meshgrid(range(64, 1024, 64), range(64, 1024, 64))
    [X2, Y2] = np.meshgrid(range(128, 1024, 128), range(128, 1024, 128))

    corners1 = dataObject([2, 225], "int32")
    corners1[0, :] = X1.flatten()
    corners1[1, :] = Y1.flatten()

    corners2 = dataObject([2, 49], "int32")
    corners2[0, :] = X2.flatten()
    corners2[1, :] = Y2.flatten()

    h2.call("plotMarkers", corners1, "r+25;2", "corners1", 0)  # draw to plane 0 only
    h2.call("plotMarkers", corners2, "c+25", "corners2", 1)  # draw to plane 1 only







.. GENERATED FROM PYTHON SOURCE LINES 131-133

.. image:: ../../_static/demoDrawMarkers_2.png
   :width: 100%


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

   **Total running time of the script:** (0 minutes 0.135 seconds)


.. _sphx_glr_download_11_demos_itom_plots_demo_drawMarkers.py:

.. only:: html

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

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

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

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

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

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

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