update readme

Author: DingWB

README.md

@@ -17,11 +17,11 @@ PyComplexHeatmap is a Python package to plot complex heatmap (clustermap). Pleas
 
 ## Dependencies:
 ----------------------
-- matplotlib<=3.7.5
+- matplotlib
 - numpy
 - pandas
 - scipy
-- fastcluster
+- fastcluster (optional)
 ```
 pip install --ignore-install matplotlib numpy pandas fastcluster
 ```

notebooks/clustermap.ipynb

@@ -1541,6 +1541,42 @@
    "source": [
     "mcolors.to_hex((0.0, 0.0, 0.0))"
    ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "34d06c38-6746-4aa8-9959-29aca7e14f82",
+   "metadata": {},
+   "source": [
+    "## Plot legends only"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "f04ea315-1034-4073-80a7-12beb91b2bc1",
+   "metadata": {},
+   "source": [
+    "### plot color dict legend"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "50269268-a257-473d-afc9-5018b41e5f72",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from PyComplexHeatmap.utils import plot_color_dict_legend\n",
+    "D=dict(mCG=\"green\",mCH='blue',ATAC=\"orange\")\n",
+    "plt.figure(figsize=(2,3))\n",
+    "ax=plt.gca()\n",
+    "plot_color_dict_legend(\n",
+    "\tD=D, ax=ax, title=\"Modality\", color_text=True, kws=dict(loc='upper left',bbox_to_anchor=(0.3,0.8),labelspacing=0.2,handleheight=1,\n",
+    "                                                            fontsize=12,bbox_transform = ax.transAxes,title_fontsize=14)\n",
+    ")\n",
+    "ax.set_axis_off()\n",
+    "plt.savefig(\"legend.pdf\",bbox_inches='tight',dpi=300,transparent=True)\n",
+    "plt.show()"
+   ]
   }
  ],
  "metadata": {