code: def simple_plot(file_name, title, x, y, xlabel, ylabel):
      """Saves the simple plot with given x and y values
  
      Parameters
      ----------
      file_name : string
          file name for saving the plot
      title : string
          title of the plot
      x : integer list
          x-axis values to be plotted
      y : integer list
          y-axis values to be plotted
      xlabel : string
          label for x-axis
      ylable : string
          label for y-axis
  
      """
  
      plt.plot(x, y)
      axes = plt.gca()
      axes.set_ylim([0, 4])
      plt.xlabel(xlabel)
      plt.ylabel(ylabel)
      plt.title(title)
  
      plt.savefig(file_name)
      plt.clf()
  
file_path: dipy/dipy/viz/regtools.py
imports: import numpy
  from dipy.utils.optpkg import optional_package
label_desc: Use image node_id 2 for calling a global function with example usage: simple_plot(file_name, title, x, y, xlabel, ylabel) without return types