python - Optimal value is outside range when doing bruteforce optimization using Scipy -


i'm following example given in scipy's optimize documentation brute-force optimization on function 3 parameters.

this function wish optimize:

def entropy_of_hyperplane(z):     w0, w1, b = z     # calculations..     return -1 * ent

to find global minimum of function using grid-serach, do:

def find_max_entropy_hyperplane(x):     # grid-search on possible w in r^2 , b in r     # , calculate entropy of each      rranges = (slice(0, 2, 0.05), slice(0, 2, 0.05), slice(-4, 4, 0.25)) # ranges w0, w1, b      resbrute = optimize.brute(entropy_of_hyperplane, rranges, full_output=true,                           finish=optimize.fmin)      w0, w1, b = resbrute[0]     print(w0, w1, b)

and result is: w0 = 1.56; w1 = 1.1; b = 1842.73906893

what going on here? how optimal value of b outside range specified? can't understand behavior. appreciated!


Comments

Post a Comment

Popular posts from this blog

PHP and MySQL WP -

i trying accomplish 2 things here code. writing php directly wp page using insert php plugin. 1) query mysql database , return results 1 column 4 columns. 2) make each result own hyperlink directs user new wp page runs new query on page. i able query show results , turn results dynamic hyperlink, cannot formatting down. right returns result 1 column. here have: [insert_php] $servername = "localhost"; $username = "login"; //edited privacy $password = "password"; //edited privacy $database = "database"; //edited privacy // create connection $conn = new mysqli($servername, $username, $password, $database); // check connection if ($conn->connect_error) { die("connection failed: " . $conn->connect_error); } echo "connected successfully"; //get results database $result = mysqli_query($conn,"select mine mines order mine"); $all_property = array(); //declare array saving property //showing proper...
Read more

android - InAppBilling registering BroadcastReceiver in AndroidManifest -

i'm implementing inapp billing in android app. works well, however, i'm trying decouple broadcast receiver activity manifest. suggestion in android's trivialdrive sample: // important: dynamically register broadcast messages updated purchases. // register receiver here instead of <receiver> in manifest // because call getpurchases() @ startup, therefore can ignore // broadcasts sent while app isn't running. // note: registering listener in activity bad idea, done here // because sample. regardless, receiver must registered after // iabhelper setup, before first call getpurchases(). currently there's class extends broadcastreceiver : public class iabbroadcastreceiver extends broadcastreceiver { /** * intent action receiver should filter for. */ public static final string action = "com.android.vending.billing.purchases_updated"; private final iabbroadcastlistener mlistener; public iabbroadcastreceiver(iabbroadcastlistener listener) { m...
Read more

go - golang pprof for c library code -

i have been trying profile golang application pprof, seems details of c code(linked static library) missed in output result. flame graph from frame graph can see c code time consuming reported within "runtime._externalcode", no details @ all. , sure static library compiled debug enable. so there way make pprof details(like stack trace) of 3rd party c code? or there other golang profiling tool this?
Read more