  param_name : `str`</span>
<span class="sd">        name of the parameter to plot.</span>
<span class="sd">        default param_name = &#39;zs&#39;.</span>
<span class="sd">    param_dict : `dict` or `str`</span>
<span class="sd">        dictionary of GW source parameters or json file name.</span>
<span class="sd">        default param_dict = &#39;./gw_params.json&#39;.</span>
<span class="sd">    param_xlabel : `str`</span>
<span class="sd">        x-axis label.</span>
<span class="sd">        default pa