diff --git a/arbor/include/arbor/morph/label_dict.hpp b/arbor/include/arbor/morph/label_dict.hpp
index 6b590b7c44d3594c42cb3985251db245d6a35d54..b9d415e868ab1e0895b7f6b43e594f8203d0a731 100644
--- a/arbor/include/arbor/morph/label_dict.hpp
+++ b/arbor/include/arbor/morph/label_dict.hpp
@@ -17,10 +17,13 @@ class ARB_ARBOR_API label_dict {
reg_map regions_;
public:
+ // construct a label dict with SWC tags predefined
+ label_dict& add_swc_tags();
+
void import(const label_dict& other, const std::string& prefix = "");
- void set(const std::string& name, locset ls);
- void set(const std::string& name, region reg);
+ label_dict& set(const std::string& name, locset ls);
+ label_dict& set(const std::string& name, region reg);
std::optional<arb::region> region(const std::string& name) const;
std::optional<arb::locset> locset(const std::string& name) const;
diff --git a/arbor/morph/label_dict.cpp b/arbor/morph/label_dict.cpp
index 9c514604a16c11159b963828d8303138ef3b67f1..bc6bca89802df552f0d465cdc280fbdf70936515 100644
--- a/arbor/morph/label_dict.cpp
+++ b/arbor/morph/label_dict.cpp
@@ -9,22 +9,32 @@
namespace arb {
+label_dict& label_dict::add_swc_tags() {
+ set("soma", reg::tagged(1));
+ set("axon", reg::tagged(2));
+ set("dend", reg::tagged(3));
+ set("apic", reg::tagged(4));
+ return *this;
+}
+
size_t label_dict::size() const {
return locsets_.size() + regions_.size();
}
-void label_dict::set(const std::string& name, arb::locset ls) {
+label_dict& label_dict::set(const std::string& name, arb::locset ls) {
if (regions_.count(name)) {
throw label_type_mismatch(name);
}
locsets_[name] = std::move(ls);
+ return *this;
}
-void label_dict::set(const std::string& name, arb::region reg) {
+label_dict& label_dict::set(const std::string& name, arb::region reg) {
if (locsets_.count(name)) {
throw label_type_mismatch(name);
}
regions_[name] = std::move(reg);
+ return *this;
}
void label_dict::import(const label_dict& other, const std::string& prefix) {
diff --git a/doc/fileformat/swc.rst b/doc/fileformat/swc.rst
index cfc9c34bdfb654030d3ba0dcdfe126195f78d2ff..cf799324da8d54626f48462f46c2ba417625faa2 100644
--- a/doc/fileformat/swc.rst
+++ b/doc/fileformat/swc.rst
@@ -36,6 +36,14 @@ its parent and inherits the tag of the sample; and if more than 1 sample have th
is interpreted as a fork point in the morphology, and acts as the proximal point to a new branch for each of its
"child" samples. There a couple of exceptions to these rules which are listed below.
+.. Note::
+
+ The SWC file format allows association of ``tags`` with parts of the
+ morphology and reserves tag values 1-4 for soma, axon, basal dendrite, and
+ apical dendrite. In Arbor, these tags can be added to a
+ :class:`arbor.label_dict` using the :meth:`~arbor.label_dict.add_swc_tags` method.
+
+
.. _formatswc-arbor:
Arbor interpretation
diff --git a/doc/tutorial/single_cell_detailed.rst b/doc/tutorial/single_cell_detailed.rst
index 85e3f66130f858f30bab6289221c5d758975a40e..806bcf56d8f2b6d9fa4bed4640c991eb6d3f148b 100644
--- a/doc/tutorial/single_cell_detailed.rst
+++ b/doc/tutorial/single_cell_detailed.rst
@@ -121,16 +121,44 @@ can be stored in a :class:`arbor.label_dict`.
More information on region and location expressions is available :ref:`here <labels>`.
-First, we can define some **regions**, These are continuous parts of the morphology,
-They can correspond to full segments or parts of segments. Our morphology already has some
-pre-established regions determined by the ``tag`` parameter of the segments. They are
-defined as follows:
+The SWC file format allows association of ``tags`` with parts of the morphology
+and reserves tag values 1-4 for commonly used sections (see `here
+<http://www.neuronland.org/NLMorphologyConverter/MorphologyFormats/SWC/Spec.html>`__
+for the SWC file format). In Arbor, these tags can be added to a :class:`arbor.label_dict` using
+the :meth:`~arbor.label_dict.add_swc_tags` method, which will define
+
+.. list-table:: Default SWC Tags
+ :widths: 25 25 50
+ :header-rows: 1
+
+ * - Tag
+ - Label
+ - Section
+ * - 1
+ - ``"soma"``
+ - Soma
+ * - 2
+ - ``"axon"``
+ - Axon
+ * - 3
+ - ``"dend"``
+ - Basal dendrite
+ * - 4
+ - ``"apic"``
+ - Apical dendrite
+
+You can alternatively define these regions by hand, using
-.. literalinclude:: ../../python/example/single_cell_detailed.py
- :language: python
- :lines: 22-32
+.. code-block:: python
-This will generate the following regions when applied to the previously defined morphology:
+ labels = arbor.label_dict({
+ "soma": "(tag 1)",
+ "axon": "(tag 2)",
+ "dend": "(tag 3)",
+ "apic": "(tag 4)",
+ })
+
+Both ways will generate the following regions when applied to the previously defined morphology:
.. figure:: ../gen-images/tutorial_tag.svg
:width: 800
diff --git a/python/cells.cpp b/python/cells.cpp
index bd4f1ba91653f0cfc63c9949a4802322f2d0df1d..73384031174dadc3cc455dbb22e7432699ec931d 100644
--- a/python/cells.cpp
+++ b/python/cells.cpp
@@ -231,7 +231,8 @@ void register_cells(pybind11::module& m) {
"A dictionary of labelled region and locset definitions, with a\n"
"unique label assigned to each definition.");
label_dict
- .def(pybind11::init<>(), "Create an empty label dictionary.")
+ .def(pybind11::init<>(),
+ "Create an empty label dictionary.")
.def(pybind11::init<const std::unordered_map<std::string, std::string>&>(),
"Initialize a label dictionary from a dictionary with string labels as keys,"
" and corresponding definitions as strings.")
@@ -248,6 +249,13 @@ void register_cells(pybind11::module& m) {
return ld;
}),
"Initialize a label dictionary from an iterable of key, definition pairs")
+ .def("add_swc_tags",
+ [](label_dict_proxy& l) { return l.add_swc_tags(); },
+ "Add standard SWC tagged regions.\n"
+ " - soma: (tag 1)\n"
+ " - axon: (tag 2)\n"
+ " - dend: (tag 3)\n"
+ " - apic: (tag 4)")
.def("__setitem__",
[](label_dict_proxy& l, const char* name, const char* desc) {
l.set(name, desc);})
diff --git a/python/example/gap_junctions.py b/python/example/gap_junctions.py
index 2076f02a34850d19eaf752eedf2b9f79f379b1f7..2541abd0098d811c733b6ed4afbf8c3ec302282a 100644
--- a/python/example/gap_junctions.py
+++ b/python/example/gap_junctions.py
@@ -32,9 +32,7 @@ def make_cable_cell(gid):
tree.append(s, arbor.mpoint(0, 0, 0, 2), arbor.mpoint(40, 0, 0, 2), tag=2)
# Label dictionary for cell components
- labels = arbor.label_dict()
- labels["soma"] = "(tag 1)"
- labels["dend"] = "(tag 2)"
+ labels = arbor.label_dict().add_swc_tags()
# Mark location for synapse site at midpoint of dendrite (branch 0 = soma + dendrite)
labels["synapse_site"] = "(location 0 0.6)"
diff --git a/python/example/single_cell_allen.py b/python/example/single_cell_allen.py
index 1127619907aec9606709caa3372ee3fc18941da0..273d5dc2f1cf09acf69e4464fd938a534d171bb3 100644
--- a/python/example/single_cell_allen.py
+++ b/python/example/single_cell_allen.py
@@ -75,15 +75,8 @@ def make_cell(swc, fit):
morphology = arbor.load_swc_neuron(swc)
# (2) Label the region tags found in the swc with the names used in the parameter fit file.
# In addition, label the midpoint of the somarbor.
- labels = arbor.label_dict(
- {
- "soma": "(tag 1)",
- "axon": "(tag 2)",
- "dend": "(tag 3)",
- "apic": "(tag 4)",
- "midpoint": "(location 0 0.5)",
- }
- )
+ labels = arbor.label_dict().add_swc_tags()
+ labels["midpoint"] = "(location 0 0.5)"
# (3) A function that parses the Allen parameter fit file into components for an arbor.decor
dflt, regions, ions, mechanisms, offset = load_allen_fit(fit)
diff --git a/python/example/single_cell_detailed.py b/python/example/single_cell_detailed.py
index 30f081b6dc5e25f5d9aeae992027df1a79743c1a..afff91736d4ec9c715d6c67bd8f1ca43d7526632 100755
--- a/python/example/single_cell_detailed.py
+++ b/python/example/single_cell_detailed.py
@@ -21,21 +21,17 @@ morph = arbor.load_swc_arbor(filename)
# (2) Create and populate the label dictionary.
-labels = arbor.label_dict()
+# Pre-defined SWC regions
+labels = arbor.label_dict().add_swc_tags()
# Regions:
-# Add labels for tag 1, 2, 3, 4
-labels["soma"] = "(tag 1)"
-labels["axon"] = "(tag 2)"
-labels["dend"] = "(tag 3)"
-labels["last"] = "(tag 4)"
# Add a label for a region that includes the whole morphology
labels["all"] = "(all)"
# Add a label for the parts of the morphology with radius greater than 1.5 μm.
labels["gt_1.5"] = '(radius-ge (region "all") 1.5)'
-# Join regions "last" and "gt_1.5"
-labels["custom"] = '(join (region "last") (region "gt_1.5"))'
+# Join regions "apic" and "gt_1.5"
+labels["custom"] = '(join (region "apic") (region "gt_1.5"))'
# Locsets:
diff --git a/python/example/single_cell_detailed_recipe.py b/python/example/single_cell_detailed_recipe.py
index ef1a4497e3a62e19c2506f8e1ee7d2dfa70d9f4e..5bcd19f8d6693e31f17d8d271fe4498bd8ec575d 100644
--- a/python/example/single_cell_detailed_recipe.py
+++ b/python/example/single_cell_detailed_recipe.py
@@ -21,21 +21,17 @@ morph = arbor.load_swc_arbor(filename)
# (2) Create and populate the label dictionary.
-labels = arbor.label_dict()
+# Label dict, with Pre-defined labels soma, axon, dend, and apic
+labels = arbor.label_dict().add_swc_tags()
# Regions:
-# Add labels for tag 1, 2, 3, 4
-labels["soma"] = "(tag 1)"
-labels["axon"] = "(tag 2)"
-labels["dend"] = "(tag 3)"
-labels["last"] = "(tag 4)"
# Add a label for a region that includes the whole morphology
labels["all"] = "(all)"
# Add a label for the parts of the morphology with radius greater than 1.5 μm.
labels["gt_1.5"] = '(radius-ge (region "all") 1.5)'
-# Join regions "last" and "gt_1.5"
-labels["custom"] = '(join (region "last") (region "gt_1.5"))'
+# Join regions "apic" and "gt_1.5"
+labels["custom"] = '(join (region "apic") (region "gt_1.5"))'
# Locsets:
diff --git a/python/example/single_cell_extracellular_potentials.py b/python/example/single_cell_extracellular_potentials.py
index 413ebb90195caf6a20a2895c8203e1573e6d521c..9f99bcd7ce0fba18d9679094bb34e8af4ad381a6 100644
--- a/python/example/single_cell_extracellular_potentials.py
+++ b/python/example/single_cell_extracellular_potentials.py
@@ -74,8 +74,7 @@ def make_cable_cell(morphology, clamp_location):
cvs_per_branch = 3
# Label dictionary
- defs = {}
- labels = arbor.label_dict(defs)
+ labels = arbor.label_dict()
# decor
decor = arbor.decor()
diff --git a/python/example/single_cell_swc.py b/python/example/single_cell_swc.py
index 06bdbf581944e26dd1f8f910a51ce138bd4f7ffe..2a229399396ec79ef948ed8b33ddda8938dcb87b 100755
--- a/python/example/single_cell_swc.py
+++ b/python/example/single_cell_swc.py
@@ -26,15 +26,13 @@ filename = sys.argv[1]
morpho = arbor.load_swc_arbor(filename)
# Define the regions and locsets in the model.
-defs = {
- "soma": "(tag 1)", # soma has tag 1 in swc files.
- "axon": "(tag 2)", # axon has tag 2 in swc files.
- "dend": "(tag 3)", # dendrites have tag 3 in swc files.
- "root": "(root)", # the start of the soma in this morphology is at the root of the cell.
- "stim_site": "(location 0 0.5)", # site for the stimulus, in the middle of branch 0.
- "axon_end": '(restrict (terminal) (region "axon"))',
-} # end of the axon.
-labels = arbor.label_dict(defs)
+labels = arbor.label_dict(
+ {
+ "root": "(root)", # the start of the soma in this morphology is at the root of the cell.
+ "stim_site": "(location 0 0.5)", # site for the stimulus, in the middle of branch 0.
+ "axon_end": '(restrict (terminal) (region "axon"))', # end of the axon. NB. 'axon' will be added below
+ }
+).add_swc_tags() # Finally, add the SWC default labels.
decor = arbor.decor()
diff --git a/python/proxy.hpp b/python/proxy.hpp
index 65c44757b3a8cac13357fc0f9459d8386ea1631c..4d79f7c8405ce4a0791913e7b1657c1146ee34de 100644
--- a/python/proxy.hpp
+++ b/python/proxy.hpp
@@ -24,6 +24,14 @@ struct label_dict_proxy {
}
}
+ label_dict_proxy& add_swc_tags() {
+ set("soma", "(tag 1)");
+ set("axon", "(tag 2)");
+ set("dend", "(tag 3)");
+ set("apic", "(tag 4)");
+ return *this;
+ }
+
label_dict_proxy(const arb::label_dict& label_dict): dict(label_dict) {
update_cache();
}
@@ -55,7 +63,7 @@ struct label_dict_proxy {
// (and vice versa.)
// * the description is not well formed, e.g. it contains a syntax error.
// * the description is well-formed, but describes neither a region or locset.
- try{
+ try {
// Evaluate the s-expression to build a region/locset.
auto result = arborio::parse_label_expression(desc);
if (!result) { // an error parsing / evaluating description.