Merge branch 'master' of https://github.com/XiaogangHe/python-climate…

…-visuals

.github/workflows/binder.yml

@@ -0,0 +1,17 @@
+name: Build Notebook Container
+on: [push] # You may want to trigger this Action on other things than a push.
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout Code
+      uses: actions/checkout@v2
+
+    - name: update jupyter dependencies with repo2docker
+      uses: jupyterhub/repo2docker-action@master
+      with:
+        NO_PUSH: true
+        MYBINDERORG_TAG: ${{ github.event.pull_request.head.ref }}
+        IMAGE_NAME: xiaoganghe/python-climate-visuals  # fixed var because Docker not allow uppercases
+        # BINDER_CACHE: true
+        # PUBLIC_REGISTRY_CHECK: true

chapters/data-analytics/numpy-basic.ipynb

@@ -7,7 +7,7 @@
    "source": [
     "# NumPy tutorial\n",
     "\n",
-    "[NumPy](http://www.numpy.org/) is the core library for scientific computing in Python. It vastly simplifies manipulating and crunching vectors and matrices. Many of python-based leading packages rely on NumPy as a infrastructure piece."
+    "[NumPy](http://www.numpy.org/) is the **core** package for scientific computing in Python. It vastly simplifies manipulating and crunching vectors and matrices. Many of other leading packages rely on NumPy as a infrastructure piece."
    ]
   },
   {
@@ -167,9 +167,9 @@
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "[[0.69381927]\n",
-      " [0.62248209]\n",
-      " [0.41387215]]\n"
+      "[[0.67742525]\n",
+      " [0.0784592 ]\n",
+      " [0.6098676 ]]\n"
      ]
     }
    ],
@@ -178,7 +178,7 @@
     "d = np.zeros((2, 2))      # Create an array of all zeros with shape (2, 2)\n",
     "d = np.ones((1, 2))       # Create an array of all ones with shape (1, 2)\n",
     "d = np.random.random((3, 1))  # Create an array of random values with shape (3, 1)\n",
-    "# try printing them\n",
+    "# Try printing them\n",
     "print(d)"
    ]
   },
@@ -191,7 +191,7 @@
    "source": [
     "## Array Indexing\n",
     "\n",
-    "There are several ways to pull out a section of arrays. The most common ways include **slicing**, **integer array indexing** and **Boolean array indexing**. We may choose the appropriate indexing methods for different purposes."
+    "The most common ways to pull out a section of arrays include **slicing**, **integer array indexing** and **Boolean array indexing**. We may choose the appropriate indexing methods for different purposes."
    ]
   },
   {
@@ -398,17 +398,17 @@
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "[4 5 6] (3,)\n",
-      "[[4 5 6]] (1, 3)\n"
+      "[1 2 3] (3,)\n",
+      "[[1 2 3]] (1, 3)\n"
      ]
     }
    ],
    "source": [
     "a = np.array([[1, 2, 3], [4, 5, 6], [7, 8, 9], [10, 11, 12]])\n",
-    "row_r1 = a[1, :]    # Mix integer indexing with slice indexing\n",
-    "row_r2 = a[1:2, :]  # Slice indexing\n",
-    "print(row_r1, row_r1.shape)  # Lower rank\n",
-    "print(row_r2, row_r2.shape)"
+    "a_1row = a[0, :]     # Mix integer indexing with slice indexing\n",
+    "a_2rows = a[0:1, :]  # Slice indexing\n",
+    "print(a_1row, a_1row.shape)   # Lower rank\n",
+    "print(a_2rows, a_2rows.shape) "
    ]
   },
   {
@@ -481,15 +481,18 @@
    },
    "outputs": [
     {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "[ 9 10 11 12]\n"
-     ]
+     "data": {
+      "text/plain": [
+       "array([ 9, 10, 11, 12])"
+      ]
+     },
+     "execution_count": 11,
+     "metadata": {},
+     "output_type": "execute_result"
     }
    ],
    "source": [
-    "print(a[a > 8])"
+    "a[a > 8]"
    ]
   },
   {
@@ -689,7 +692,7 @@
     }
    ],
    "source": [
-    "x = np.array([[1, 2], [3, 4]], dtype=np.float64)\n",
+    "x = np.array([[1, 2], [3, 4]], dtype=np.float64) # Set data types of elements by dtype\n",
     "y = np.array([[5, 6], [7, 8]], dtype=np.float64)\n",
     "\n",
     "# Elementwise sum; both produce an array\n",
@@ -989,7 +992,7 @@
     "id": "89e2FXxFL9jQ"
    },
    "source": [
-    "Broadcasting typically makes your code more ***concise***, ***readable***, and more importantly, ***faster***, so you should strive to use it where possible."
+    "Broadcasting typically makes your code more ***concise***, ***readable***, and more importantly, ***faster***."
    ]
   },
   {