diff --git a/N803_collector_2.m b/N803_collector_2.m
index 279dec4..c028ea0 100644
--- a/N803_collector_2.m
+++ b/N803_collector_2.m
@@ -51,9 +51,9 @@
 X(6:2:16) = { [ (-22:0)*7 (1:.5:10*7) ] } ;
 X{17} = [ (-.5:.5:44) 44+(1:250) ] *7  ;
 X{18} = [ (-.5:.5:10) 10+(1:250) ] *7  ;
-X(19:21) = { -7:1:7*24 } ;
-X(22:24) = { -7:1:7*52 } ;
-X(25:26) = { -7:1:7*24 } ;
+X(19:21) = { (-1:.2:24)*7 } ;
+X(22:24) = { (-1:.5:52)*7 } ;
+X(25:26) = { (-1:.2:24)*7 } ;
 
 % x-values (days) for doses given
 Dose{1} = 7*[0:3 5:8 37:40]  ;