Mercurial > repos > AlgTools / changeset

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+
+# Algorithm tools for Julia
+
+Author: Tuomo Valkonen <tuomov@iki.fi>
+
+This repository contains some general utility routines and tools for doing
+iterative algorithms in Julia:
+
+  * Tools to facilitate working with `Channel`s
+  * Linked lists and writing them to log files.
+  * Structs: iteration, field replacement
+  * Calculation of norms, dot products, projections
+  * Conditional thread execution macros
+  * Template for conveniently writing iterative algorithms using `do`-block anonymous functions as algorithm steps, with visualisation/verbosity implemented generally in iterator. 
+
+  The code is used, for example, by <http://dx.doi.org/10.5281/zenodo.3659180>.
+
+## Iterative algorithms example
+
+The package includes `simple_iterate` which helps separating the computational step of iterative algorithms for visualisation routines. It is merely intended to serve as a template, as different applications require different visualisation routines to be implemented in a replacement of `simple_iterate`.  The computational step is implemented as a `do`-block anonymous function that gets passed another function is a parameter for doing the verbosity on request. Example:
+
+```julia
+using AlgTools.Iterate
+
+params = (verbose_iter = 10, maxiter = 100,)
+
+begin
+    local x = 1
+    simple_iterate(params) do verbose
+        # This is our computational step, as an anonymous
+        # `do`-block function. It has one parameter: `verbose`,
+        # itself a function.
+        x = x + √x
+        verbose() do
+            # This is another anonymous function that will
+            # only get called when decided by `verbose`.
+            # If we do get called, return current value
+            return x, nothing
+        end
+    end
+end
+```
+This will output
+```
+10/100 J=31.051164
+20/100 J=108.493699
+30/100 J=234.690039
+40/100 J=410.056327
+50/100 J=634.799262
+60/100 J=909.042928
+70/100 J=1232.870172
+80/100 J=1606.340254
+90/100 J=2029.497673
+100/100 J=2502.377071
+```
+