Minor fixes and improvements for Sage (Jupyter Notebook) -> Markdown

Makefile

@@ -17,7 +17,7 @@ commands :
 	@grep -h -E '^##' ${MAKEFILES} | sed -e 's/## //g'
 
 ## serve            : run a local server.
-serve : lesson-rmd
+serve : lesson-rmd lesson-ipynb
 	${JEKYLL} serve
 
 ## site             : build files but do not run a server.
@@ -62,7 +62,7 @@ RMD_DST = $(patsubst _episodes_rmd/%.Rmd,_episodes/%.md,$(RMD_SRC))
 
 # RMarkdown files
 IPYNB_SRC = $(wildcard _episodes_ipynb/??-*.ipynb)
-IPYNB_DST = $(patsubst _episodes_ipynb/%.ipynb,_episodes/%.ipynb,$(RMD_SRC))
+IPYNB_DST = $(patsubst _episodes_ipynb/%.ipynb,_episodes/%.ipynb,$(IPYNB_SRC))
 
 # Lesson source files in the order they appear in the navigation menu.
 MARKDOWN_SRC = \
@@ -88,7 +88,7 @@ HTML_DST = \
 lesson-rmd: $(RMD_SRC)
 	@bin/knit_lessons.sh $(RMD_SRC)
 
-## lesson-ipynb       : convert IPython Notebook files to markdown
+## lesson-ipynb     : convert IPython Notebook files to markdown
 lesson-ipynb: $(IPYNB_SRC)
 	${SAGE} -sh -c "jupyter nbconvert -y --execute --allow-errors --to markdown --output-dir=_episodes --template=_layouts/ipynb2md.tpl $(IPYNB_SRC)"
 
@@ -112,6 +112,8 @@ unittest :
 lesson-files :
 	@echo 'RMD_SRC:' ${RMD_SRC}
 	@echo 'RMD_DST:' ${RMD_DST}
+	@echo 'IPYNB_SRC:' ${IPYNB_SRC}
+	@echo 'IPYNB_DST:' ${IPYNB_DST}
 	@echo 'MARKDOWN_SRC:' ${MARKDOWN_SRC}
 	@echo 'HTML_DST:' ${HTML_DST}
 

_config.yml

@@ -67,3 +67,6 @@ exclude:
 
 # Turn off built-in syntax highlighting.
 highlighter: false
+
+kramdown:
+  parse_block_html: true

_episodes/01-introduction.md

@@ -0,0 +1,110 @@
+---
+title: First session with SageMath
+teaching: 30
+exercises: 0
+questions:
+- "..."
+objectives:
+- "..."
+---
+
+Lesson text
+
+
+
+~~~
+1 + 1
+~~~
+{: .source .python}
+
+
+
+~~~
+2
+~~~
+{: .output}
+
+
+
+
+~~~
+matrix([[1,2], [3,4]])^(-1)
+~~~
+{: .source .python}
+
+
+
+~~~
+[  -2    1]
+[ 3/2 -1/2]
+~~~
+{: .output}
+
+
+Output with error message:
+
+
+~~~
+x[10]
+~~~
+{: .source .python}
+
+~~~
+---------------------------------------------------------------------------
+TypeError Traceback (most recent call last)
+<ipython-input-3-084faa554d6d> in <module>()
+----> 1 x[Integer(10)]
+
+TypeError: 'sage.symbolic.expression.Expression' object does not support indexing
+~~~
+{: .error}
+Output generating figures:
+
+
+~~~
+plot(sin, (0,10))
+~~~
+{: .source .python}
+
+
+
+![png](../01-introduction_files/01-introduction_6_0.png)
+
+
+For the challenges
+you need to pay attention to include `<blockquote class="challenge">`
+before it and `<\blockquote>` after it.
+And for the solutions
+you need to pay attention to include `<blockquote class="solution">`
+before it and `<\blockquote>` after it.
+**This hacks is necessary for allow include Jupyter cells on challenges and solutions.**
+<blockquote class="challenge">
+## Challenge: Can you do it?
+
+What is the output of this command?
+
+~~~
+"a" + "b"
+~~~
+{: .source}
+
+<blockquote class="solution">
+
+## Solution
+
+
+~~~
+"a" + "b"
+~~~
+{: .source .python}
+
+
+
+~~~
+'ab'
+~~~
+{: .output}
+
+
+</blockquote>
+</blockquote>

_episodes/02-multiply-matrix-and-vector.md

@@ -0,0 +1,163 @@
+---
+title: Multiply a matrix and a vector
+teaching: 30
+exercises: 0
+questions:
+- "..."
+objectives:
+- "..."
+---
+Let us define the 3 x 3 minus-identity matrix
+
+
+~~~
+A = matrix([[-1,0,0], [0,-1,0], [0,0,-1]])
+A
+~~~
+{: .source .python}
+
+
+
+~~~
+[-1  0  0]
+[ 0 -1  0]
+[ 0  0 -1]
+~~~
+{: .output}
+
+
+Or simply
+
+
+~~~
+A = -identity_matrix(3)
+A
+~~~
+{: .source .python}
+
+
+
+~~~
+[-1  0  0]
+[ 0 -1  0]
+[ 0  0 -1]
+~~~
+{: .output}
+
+
+Define vector `v` to be the vector with coordinates `x`, `y`, `z`
+
+
+~~~
+v = vector([x, y, z])
+~~~
+{: .source .python}
+
+~~~
+---------------------------------------------------------------------------
+NameError Traceback (most recent call last)
+<ipython-input-3-74f33ececb47> in <module>()
+----> 1 v = vector([x, y, z])
+
+NameError: name 'y' is not defined
+~~~
+{: .error}
+Didn't work... We need to define `y` (and `z`) as symbolic variables. Only `x` is defined by default when you launch Sage!
+
+
+~~~
+x, y, z = SR.var("x y z")
+~~~
+{: .source .python}
+
+
+~~~
+v = vector([x, y, z])
+v
+~~~
+{: .source .python}
+
+
+
+~~~
+(x, y, z)
+~~~
+{: .output}
+
+
+Multiply matrix and vector using `*`
+
+
+~~~
+A * v
+~~~
+{: .source .python}
+
+
+
+~~~
+(-x, -y, -z)
+~~~
+{: .output}
+
+
+
+
+~~~
+v.subs(x=1, y=0, z=3)
+~~~
+{: .source .python}
+
+
+
+~~~
+(1, 0, 3)
+~~~
+{: .output}
+
+
+
+
+~~~
+A * v.subs(x=1, y=0, z=3)
+~~~
+{: .source .python}
+
+
+
+~~~
+(-1, 0, -3)
+~~~
+{: .output}
+
+
+
+
+~~~
+A * v
+~~~
+{: .source .python}
+
+
+
+~~~
+(-x, -y, -z)
+~~~
+{: .output}
+
+
+
+
+~~~
+_.subs(x=1, y=0, z=3)
+~~~
+{: .source .python}
+
+
+
+~~~
+(-1, 0, -3)
+~~~
+{: .output}
+
+