Merge pull request #20 from Dyalog/v0.4.1

v0.4.1
Dyalog · Feb 1, 2022 · 3b2a1b1 · 3b2a1b1
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -7,6 +7,13 @@ In the first instance, it lists the changes between consecutive releases of this
 However, because this book is a rework of the first edition by Bernard Legrand,
 this changelog also marks with [n] content that is new in this rework.
 
+## 0.4.1
+
+  - Fix typos.
+  - Fix duplicate headers in “Some Primitive Functions”:
+    - Under “Axis Specification”, there were 2 almost-consecutive duplicate level 4 headers under the _same_ level 3 header, and it made sense to join them together;
+    - Rename “Special Notations” to “Replicate with Axis” under the section on replicate, to make the header more explicit;
+
 ## v0.4
 
   - Add chapter “Nested Arrays (Continued)”:

diff --git a/Data-and-Variables.ipynb b/Data-and-Variables.ipynb
@@ -5797,7 +5797,7 @@
     "## The Specialist's Section\n",
     "\n",
     "<br />\n",
-    "<center><i>Each chapter is followed by a \"Specialist's Section\" like this one. This section is dedicated to skilled APLers, who wish to improve their knowledge.</i>\n",
+    "<center><i>Each chapter is followed by a \"Specialist's Section\" like this one. This section is dedicated to skilled APLers who wish to improve their knowledge.</i>\n",
     "    \n",
     "You will find here rare or complex usages of the concepts presented in this chapter, or discover extended explanations which need the knowledge of some symbols that will be seen much further in the book.\n",
     "    \n",

diff --git a/Execute-and-Format-Control.ipynb b/Execute-and-Format-Control.ipynb
@@ -7056,7 +7056,7 @@
     "## The Specialist's Section\n",
     "\n",
     "<br />\n",
-    "<center><i>Each chapter is followed by a \"Specialist's Section\" like this one. This section is dedicated to skilled APLers, who wish to improve their knowledge.</i>\n",
+    "<center><i>Each chapter is followed by a \"Specialist's Section\" like this one. This section is dedicated to skilled APLers who wish to improve their knowledge.</i>\n",
     "\n",
     "You will find here rare or complex usages of the concepts presented in this chapter, or discover extended explanations which need the knowledge of some symbols that will be seen much further in the book.\n",
     "\n",

diff --git a/First-Aid-Kit.ipynb b/First-Aid-Kit.ipynb
@@ -3315,7 +3315,7 @@
     "## The Specialist's Section\n",
     "\n",
     "<br />\n",
-    "<center><i>Each chapter is followed by a \"Specialist's Section\" like this one. This section is dedicated to skilled APLers, who wish to improve their knowledge.</i>\n",
+    "<center><i>Each chapter is followed by a \"Specialist's Section\" like this one. This section is dedicated to skilled APLers who wish to improve their knowledge.</i>\n",
     "    \n",
     "You will find here rare or complex usages of the concepts presented in this chapter, or discover extended explanations which need the knowledge of some symbols that will be seen much further in the book.\n",
     "    \n",

diff --git a/Nested-Arrays-Continued.ipynb b/Nested-Arrays-Continued.ipynb
@@ -8176,7 +8176,7 @@
     "\n",
     "<br />\n",
     "<center>\n",
-    "<i>Each chapter is followed by a \"Specialist's Section\" like this one. This section is dedicated to skilled APLers, who wish to improve their knowledge.</i>\n",
+    "<i>Each chapter is followed by a \"Specialist's Section\" like this one. This section is dedicated to skilled APLers who wish to improve their knowledge.</i>\n",
     "You will find here rare or complex usages of the concepts presented in this chapter, or discover extended explanations which need the knowledge of some symbols that will be seen much further in the book.\n",
     "\n",
     "<b>If you are exploring APL for the first time, skip this section and go to the next chapter.</b>\n",

diff --git a/Some-Primitive-Functions.ipynb b/Some-Primitive-Functions.ipynb
@@ -5328,23 +5328,6 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "#### Axis Is Like an Operator\n",
-    "\n",
-    "The dimension specified within brackets is the axis along which the function is applied.\n",
-    "\n",
-    "This produces a derived function, and for this reason, the pair of _axis_ brackets is often called the _axis operator_.\n",
-    "\n",
-    "The syntax for _axis_ does not quite follow the general syntax for operators, but it shares all other properties with genuine operators. _Axis_ takes a function as its left operand (the derived function `+/` in the last example above), the dimension specification as its \"right operand\" (3 in the example), and produces a derived function, which is applied to `prod` to calculate the annual sums.\n",
-    "\n",
-    "Viewed as an operator, _axis_ is therefore dyadic. It is, however, important to emphasise that its \"right\" operand is not `prod`, it is the expression within the brackets. This is the first example of an operator that takes an array as an operand. We will find some more as we explore operators later on."
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "#### Processing Arrays\n",
-    "\n",
     "We shall learn more about _axis_ in [the \"Operators\" chapter](./Operators.ipynb); let us first explore another simple use of this operator.\n",
     "\n",
     "Suppose that we would like to multiply each of the rows (or columns) of a matrix by different values; we can use _axis_ to specify whether we multiply row-wise or column-wise. First, here is a matrix:"
@@ -5434,6 +5417,21 @@
     "tam×[2]2 5 0 2 1"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "#### Axis Is Like an Operator\n",
+    "\n",
+    "The dimension specified within brackets is the axis along which the function is applied.\n",
+    "\n",
+    "This produces a derived function, and for this reason, the pair of _axis_ brackets is often called the _axis operator_.\n",
+    "\n",
+    "The syntax for _axis_ does not quite follow the general syntax for operators, but it shares all other properties with genuine operators. _Axis_ takes a function as its left operand (the derived function `+/` in the last example above), the dimension specification as its \"right operand\" (3 in the example), and produces a derived function, which is applied to `prod` to calculate the annual sums.\n",
+    "\n",
+    "Viewed as an operator, _axis_ is therefore dyadic. It is, however, important to emphasise that its \"right\" operand is not `prod`, it is the expression within the brackets. This is the first example of an operator that takes an array as an operand. We will find some more as we explore operators later on."
+   ]
+  },
   {
    "cell_type": "markdown",
    "metadata": {},
@@ -7848,7 +7846,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "### Special Notations\n",
+    "### Replicate with Axis\n",
     "\n",
     "Like _reduce_ and _catenate_, _replicate_ works along the last dimension of an array by default. However, it is possible for it to work on any dimension by using the _axis_. It is also possible to use `⌿`, which we have already seen, to work on the first dimension by default.\n",
     "\n",
@@ -11618,7 +11616,7 @@
     "## The Specialist's Section\n",
     "\n",
     "<br />\n",
-    "<center><i>Each chapter is followed by a \"Specialist's Section\" like this one. This section is dedicated to skilled APLers, who wish to improve their knowledge.</i>\n",
+    "<center><i>Each chapter is followed by a \"Specialist's Section\" like this one. This section is dedicated to skilled APLers who wish to improve their knowledge.</i>\n",
     "    \n",
     "You will find here rare or complex usages of the concepts presented in this chapter, or discover extended explanations which need the knowledge of some symbols that will be seen much further in the book.\n",
     "    \n",

diff --git a/User-Defined-Functions.ipynb b/User-Defined-Functions.ipynb
@@ -9040,7 +9040,7 @@
     "## The Specialist's Section\n",
     "\n",
     "<br />\n",
-    "<center><i>Each chapter is followed by a \"Specialist's Section\" like this one. This section is dedicated to skilled APLers, who wish to improve their knowledge.</i>\n",
+    "<center><i>Each chapter is followed by a \"Specialist's Section\" like this one. This section is dedicated to skilled APLers who wish to improve their knowledge.</i>\n",
     "    \n",
     "You will find here rare or complex usages of the concepts presented in this chapter, or discover extended explanations which need the knowledge of some symbols that will be seen much further in the book.\n",
     "    \n",

diff --git a/Working-on-Data-Shape.ipynb b/Working-on-Data-Shape.ipynb
@@ -4921,7 +4921,7 @@
     "\n",
     "<br />\n",
     "<center>\n",
-    "<i>Each chapter is followed by a \"Specialist's Section\" like this one. This section is dedicated to skilled APLers, who wish to improve their knowledge.</i>\n",
+    "<i>Each chapter is followed by a \"Specialist's Section\" like this one. This section is dedicated to skilled APLers who wish to improve their knowledge.</i>\n",
     "You will find here rare or complex usages of the concepts presented in this chapter, or discover extended explanations which need the knowledge of some symbols that will be seen much further in the book.\n",
     "    \n",
     "<b>If you are exploring APL for the first time, skip this section and go to the next chapter.</b>\n",