diff --git a/src/generate_powlaw_sed.cpp b/src/generate_powlaw_sed.cpp
index b02fbfe..f0c5e9a 100644
--- a/src/generate_powlaw_sed.cpp
+++ b/src/generate_powlaw_sed.cpp
@@ -1,6 +1,7 @@
 #include "agn.hpp"
 #include "sed.hpp"
 
+// This is old and probably doesn't work.
 
 int main(int argc, char const *argv[])
 {
diff --git a/src/sed.hpp b/src/sed.hpp
index 7b6f9f1..3fa43b7 100644
--- a/src/sed.hpp
+++ b/src/sed.hpp
@@ -32,9 +32,25 @@ const double IN_EV_2500A=12398.41929/2500;
 //	SEDs are represented by 2d histogram tables.
 struct sed_table {
 	std::string header;
-	table1d value;
+	table1d table;
 };
 
+class powerlaw {
+private:
+    // f(x) = _normal*x^_power
+    double _power;
+    double _normal;
+public:
+    powerlaw(): _power(0), _normal(0) {}
+    powerlaw(coord2d x0,coord2d x1):
+        _power((log(x1.second)-log(x0.second))/(log(x1.first)-log(x0.first))),
+        _normal((log(x0.second)-(_power*log(x0.first))))
+        {}
+    powerlaw(coord2d x0,double slope):
+        _power(slope),
+        _normal((log(x0.second)-(_power*log(x0.first))))
+        {}
+};
 
 class sed {
 public:
@@ -43,30 +59,18 @@ public:
     sed_table histogram_table(int n);
 
     // Argument is photon energy in eV
-    virtual double value(double hnu) {};
+    virtual double table(double hnu) {};
 
     sed() {};
 };
 
 class sed_powerlaw_spline : public sed {
 private:
-    Spline<double,double> _spline;
-
-    // powerlaw parameters
-    double _ir_slope = 3;
-    double _ir_high_point_x;
-    double _ir_high_point_y;
-    double _uv_low_point_x;
-    double _uv_low_point_y;
-    double _uv_high_point_x;
-    double _uv_high_point_y;
-    double _xray_low_point_x;
-    double _xray_low_point_y;
-    double _xray_high_point_x;
-    double _xray_high_point_y;
-    double _gamma_low_point_x;
-    double _gamma_low_point_y;
-    double _gamma_slope = -2;
+    Spline<double,double> _output_model;
+    powerlaw _ir_powerlaw;
+    powerlaw _uv_powerlaw;
+    powerlaw _xray_powerlaw;
+    powerlaw _gamma_powerlaw;
 
     // These parameters might still be useful for rolling off various quantities, but aren't used in the strict-spline case.
 
@@ -79,14 +83,14 @@ private:
     double _xray_coefficient;
 
 public:
-    double value(double hnu);
+    double table(double hnu);
     sed_powerlaw_spline(agn::sed_table& samples,
                         agn::sed_table& powerlaw_coords);
 };
 
 class sed_pow_law : public sed {
 public:
-    double value(double hnu);
+    double table(double hnu);
     // Argument is photon energy in eV
     double eval_uv(double hnu);
     double eval_xray(double hnu);
@@ -154,40 +158,42 @@ std::string cloudy_interpolate_str(sed_table SED);
 agn::sed_powerlaw_spline::sed_powerlaw_spline(
     agn::sed_table& samples,
     agn::sed_table& powerlaw_coords
-    ) {
-    std::vector<double> x;
-    std::vector<double> y;
-    samples
-    iterator1d table_it = powerlaw_coords.value.begin();
-    _ir_high_point_x = table_it->first;
-    _ir_high_point_y = table_it->second;
-    table_it++;
-    _uv_high_point_x = table_it->first;
-    _uv_high_point_y = table_it->second;
-    table_it++;
-    _uv_high_point_x = table_it->first;
-    _uv_high_point_y = table_it->second;
-    table_it++;
-    _xray_high_point_x = table_it->first;
-    _xray_high_point_y = table_it->second;
-    table_it++;
-    _xray_high_point_x = table_it->first;
-    _xray_high_point_y = table_it->second;
-    table_it++;
-    _gamma_high_point_x = table_it->first;
-    _gamma_high_point_y = table_it->second;
+    )
+{
+    // coordinate vectors will be used to construct spline sed model
+    std::vector<double> x0;
+    std::vector<double> x1;
+
+    // powerlaws are evaluated across four regions of the sed, first
+    iterator1d table_it = powerlaw_coords.table.begin();
+    double ir_power = 3;
+    coord2d ir_high_point = *table_it; table_it++;
+    coord2d uv_low_point = *table_it; table_it++;
+    coord2d uv_high_point = *table_it; table_it++;
+    coord2d xray_low_point = *table_it; table_it++;
+    coord2d xray_high_point = *table_it; table_it++;
+    coord2d gamma_low_point = *table_it;
+    double gamma_power = -2;
+    _ir_powerlaw = powerlaw(ir_high_point,ir_power);
+    _uv_powerlaw = powerlaw(uv_low_point,uv_high_point);
+    _xray_powerlaw = powerlaw(xray_low_point,xray_high_point);
+    _gamma_powerlaw = powerlaw(gamma_low_point,gamma_power);
+
+    ir_bounds=
+
     for (int i=0; i<10; i++) {
-        _
-        agn::coord2d uv_point = 
+        _ir_powerlaw.eval()
     }
-    table_it = samples.value.begin();
-    while(table_it != samples.value.end()) {
-        x.push_back(table_it->first);
-        y.push_back(table_it->second);
+
+    // load all samples into coordinate vectors
+    table_it = samples.table.begin();
+    while(table_it != samples.table.end()) {
+        x0.push_back(table_it->first);
+        x1.push_back(table_it->second);
         table_it++;
     }
-    Spline<double,double> newspline(x,y);
-    _spline = newspline;
+    Spline<double,double> newspline(x0,x1);
+    _output_model = newspline;
 }
 
 agn::sed_pow_law::sed_pow_law (
@@ -208,12 +214,12 @@ agn::sed_pow_law::sed_pow_law (
     _cutoff_xray_rydberg(cutoff_xray_rydberg),
     _log_radius_in_cm(log_radius_in_cm),
     _scaling_factor(scaling_factor)
-    {
-        _cutoff_uv_eV = cutoff_uv_rydberg*RYDBERG_UNIT_EV;
-        _cutoff_xray_eV = cutoff_xray_rydberg*RYDBERG_UNIT_EV;
-        _radius_in_cm = pow(10,log_radius_in_cm);
-        _radius_in_cm_squared = _radius_in_cm*_radius_in_cm;
-        _xray_coefficient = agn::sed_pow_law::SED_at_2KeV();
+{
+    _cutoff_uv_eV = cutoff_uv_rydberg*RYDBERG_UNIT_EV;
+    _cutoff_xray_eV = cutoff_xray_rydberg*RYDBERG_UNIT_EV;
+    _radius_in_cm = pow(10,log_radius_in_cm);
+    _radius_in_cm_squared = _radius_in_cm*_radius_in_cm;
+    _xray_coefficient = agn::sed_pow_law::SED_at_2KeV();
 }
 
 
@@ -225,26 +231,26 @@ agn::sed_table agn::sed::histogram_table(int n){
     double max=0,min=1,hnu;
     for(int i=0; i<n; i++) {
         hnu = hnu_at(i,n);
-        output.value[hnu] = this->value(hnu);
-        if (output.value[hnu] > max) max = output.value[hnu];
-        if (output.value[hnu] < min) min = output.value[hnu];
+        output.table[hnu] = this->table(hnu);
+        if (output.table[hnu] > max) max = output.table[hnu];
+        if (output.table[hnu] < min) min = output.table[hnu];
     }
     // Add a final point at 100 KeV
     hnu = 1e5;
-    output.value[hnu] = this->value(hnu);
+    output.table[hnu] = this->table(hnu);
     return output;
 }
 
 // sed_powerlaw_spline evaluation
-double agn::sed_powerlaw_spline::value(double hnu) {
+double agn::sed_powerlaw_spline::table(double hnu) {
     double magnitude=0.0;
-    magnitude += this->_spline[hnu];
+    magnitude += this->_output_model[hnu];
     if (magnitude < agn::CONT_MIN_VAL) return agn::CONT_MIN_VAL;
     return magnitude;
 }
 
 // sed_pow_law evaluations
-double agn::sed_pow_law::value(double hnu) {
+double agn::sed_pow_law::table(double hnu) {
     double magnitude=0.0;
     magnitude += this->eval_uv(hnu);
     magnitude += this->eval_xray(hnu);
@@ -296,7 +302,7 @@ agn::sed_table agn::read_sed_table(std::ifstream& table_file) {
     }
     while(!table_file.eof()) {
         table_file >> hnu;
-        table_file >> resultant.value[hnu];
+        table_file >> resultant.table[hnu];
     }
     return resultant;
 }
@@ -306,7 +312,7 @@ agn::sed_table agn::read_and_convert_sed_table(std::ifstream& table_file) {
     sed_table resultant;
     std::string scratch;
     int current_line=0;
-    double hnu_in_ryd,hnu_in_ev,value;
+    double hnu_in_ryd,hnu_in_ev,table;
     std::getline(table_file,scratch);
     if(!isdigit(scratch[0])) {
         resultant.header = scratch;
@@ -317,7 +323,7 @@ agn::sed_table agn::read_and_convert_sed_table(std::ifstream& table_file) {
         //std::cout << c;
         table_file >> hnu_in_ryd;
         hnu_in_ev = hnu_in_ryd*agn::RYDBERG_UNIT_EV;
-        table_file >> resultant.value[hnu_in_ev];
+        table_file >> resultant.table[hnu_in_ev];
         getline(table_file,scratch);
     }
 }
@@ -327,8 +333,8 @@ std::string agn::format_sed_table(agn::sed_table table) {
     if (!table.header.empty()) output << table.header;
     output << std::setprecision(5);
     agn::table1d::iterator table_iterator;
-    table_iterator=table.value.begin();
-    while(table_iterator != table.value.end()) {
+    table_iterator=table.table.begin();
+    while(table_iterator != table.table.end()) {
         output
             << std::fixed
             << std::scientific
@@ -344,7 +350,7 @@ std::string agn::format_sed_table(agn::sed_table table) {
 
 std::string agn::cloudy_interpolate_str(agn::sed_table table) {
     std::stringstream output;
-    agn::table1d::iterator table_iterator = table.value.begin();
+    agn::table1d::iterator table_iterator = table.table.begin();
     // Lead in to uv bump at slope=2 in log(energy [rydberg]) space
     double energy_in_rydbergs = table_iterator->first
                                 / agn::RYDBERG_UNIT_EV;
@@ -365,7 +371,7 @@ std::string agn::cloudy_interpolate_str(agn::sed_table table) {
         << ")";
     int count=0;
 
-    while(table_iterator != table.value.end()) {
+    while(table_iterator != table.table.end()) {
         energy_in_rydbergs = table_iterator->first 
                                     / agn::RYDBERG_UNIT_EV;
         double log_SED_density = log10( table_iterator->second
diff --git a/src/table_powerlaw_spline_sed.cpp b/src/table_powerlaw_spline_sed.cpp
index d816710..7178faf 100644
--- a/src/table_powerlaw_spline_sed.cpp
+++ b/src/table_powerlaw_spline_sed.cpp
@@ -2,6 +2,9 @@
 #include "sed.hpp"
 
 
+// Syntax: table_powerlaw_spline <samples table> <powerlaw coordinates> <output table>
+
+
 int main(int argc, char const *argv[])
 {
 
@@ -9,8 +12,7 @@ int main(int argc, char const *argv[])
         << "Setting up environment.\n";
 
     //  Create 2d table using n bins, linear values of SED. The
-    // agn sed_powerlaw_spline class has a function for this. A 
-    // std::map<double,double> represents the table.
+    // agn sed_powerlaw_spline class has a function for this.
     int n = 1000;
     agn::sed_table SED;
     agn::sed_table samples;