added note on wavelength units

Author: beatricebs

CRISM_unsupervised_classification.ipynb

@@ -60,7 +60,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 2,
+   "execution_count": 1,
    "id": "88631954-e3b9-48c0-bcb5-2c9c9a3812cf",
    "metadata": {},
    "outputs": [],
@@ -106,7 +106,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 3,
+   "execution_count": 2,
    "id": "003ae445-a966-4aec-8d85-f0aeaf0e1093",
    "metadata": {},
    "outputs": [],
@@ -120,6 +120,10 @@
     "img = open_image(path_if)\n",
     "wavelength = np.array(img.metadata['wavelength']).astype(float)\n",
     "\n",
+    "#the code below is implemented for wavelengths in units of nanometers (nm)\n",
+    "#if the wavelengths of your data are in microns, you should run the line below and convert to nm\n",
+    "#wavelength = wavelength*1000.\n",
+    "\n",
     "#converting img to simple array and putting no-values to NaN\n",
     "nan_img = np.copy(img[:,:,:])\n",
     "nan_img[nan_img>10]=np.nan"