topic Issue with adding &quot;lackfit&quot; statment in SAS Programming https://communities.sas.com/t5/SAS-Programming/Issue-with-adding-quot-lackfit-quot-statment/m-p/537997#M148063 <P>I'm having an issuing adding a "lackfit" statement to a proc regression model... I keep getting a "0" answer for my Pure Error Sum of Squares value, which I don't think is correct. If my data set has 3 X variables, is the lackfit statement still functional?&nbsp;</P><P>&nbsp;</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="HW4 - ANOVA Table.PNG" style="width: 600px;"><img src="https://communities.sas.com/t5/image/serverpage/image-id/27376i9E1D371E4CEE2BA3/image-size/large?v=v2&amp;px=999" role="button" title="HW4 - ANOVA Table.PNG" alt="HW4 - ANOVA Table.PNG" /></span></P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="HW4 - Parameter Estimates.PNG" style="width: 600px;"><img src="https://communities.sas.com/t5/image/serverpage/image-id/27377i5D2C09C4E6F3156C/image-size/large?v=v2&amp;px=999" role="button" title="HW4 - Parameter Estimates.PNG" alt="HW4 - Parameter Estimates.PNG" /></span></P><TABLE border="0" cellspacing="0" cellpadding="0"><TBODY><TR><TD>Obs</TD><TD>CITY</TD><TD>Y</TD><TD>X1</TD><TD>X2</TD><TD>X3</TD></TR><TR><TD>1</TD><TD>1</TD><TD>11.2</TD><TD>587</TD><TD>16.5</TD><TD>6.2</TD></TR><TR><TD>2</TD><TD>2</TD><TD>13.4</TD><TD>643</TD><TD>20.5</TD><TD>6.4</TD></TR><TR><TD>3</TD><TD>3</TD><TD>40.7</TD><TD>635</TD><TD>26.3</TD><TD>9.3</TD></TR><TR><TD>4</TD><TD>4</TD><TD>5.3</TD><TD>692</TD><TD>16.5</TD><TD>5.3</TD></TR><TR><TD>5</TD><TD>5</TD><TD>24.8</TD><TD>1248</TD><TD>19.2</TD><TD>7.3</TD></TR><TR><TD>6</TD><TD>6</TD><TD>12.7</TD><TD>643</TD><TD>16.5</TD><TD>5.9</TD></TR><TR><TD>7</TD><TD>7</TD><TD>20.9</TD><TD>1964</TD><TD>20.2</TD><TD>6.4</TD></TR><TR><TD>8</TD><TD>8</TD><TD>35.7</TD><TD>1531</TD><TD>21.3</TD><TD>7.6</TD></TR><TR><TD>9</TD><TD>9</TD><TD>8.7</TD><TD>713</TD><TD>17.2</TD><TD>4.9</TD></TR><TR><TD>10</TD><TD>10</TD><TD>9.6</TD><TD>749</TD><TD>14.3</TD><TD>6.4</TD></TR><TR><TD>11</TD><TD>11</TD><TD>14.5</TD><TD>7895</TD><TD>18.1</TD><TD>6</TD></TR><TR><TD>12</TD><TD>12</TD><TD>26.9</TD><TD>762</TD><TD>23.1</TD><TD>7.4</TD></TR><TR><TD>13</TD><TD>13</TD><TD>15.7</TD><TD>2793</TD><TD>19.1</TD><TD>5.8</TD></TR><TR><TD>14</TD><TD>14</TD><TD>36.2</TD><TD>741</TD><TD>24.7</TD><TD>8.6</TD></TR><TR><TD>15</TD><TD>15</TD><TD>18.1</TD><TD>625</TD><TD>18.6</TD><TD>6.5</TD></TR><TR><TD>16</TD><TD>16</TD><TD>28.9</TD><TD>854</TD><TD>24.9</TD><TD>8.3</TD></TR><TR><TD>17</TD><TD>17</TD><TD>14.9</TD><TD>716</TD><TD>17.9</TD><TD>6.7</TD></TR><TR><TD>18</TD><TD>18</TD><TD>25.8</TD><TD>921</TD><TD>22.4</TD><TD>8.6</TD></TR><TR><TD>19</TD><TD>19</TD><TD>21.7</TD><TD>595</TD><TD>20.2</TD><TD>8.4</TD></TR><TR><TD>20</TD><TD>20</TD><TD>25.7</TD><TD>3353</TD><TD>16.9</TD><TD>6.7</TD></TR></TBODY></TABLE> Sat, 23 Feb 2019 17:40:58 GMT mpiotro2 2019-02-23T17:40:58Z Issue with adding "lackfit" statment https://communities.sas.com/t5/SAS-Programming/Issue-with-adding-quot-lackfit-quot-statment/m-p/537997#M148063 <P>I'm having an issuing adding a "lackfit" statement to a proc regression model... I keep getting a "0" answer for my Pure Error Sum of Squares value, which I don't think is correct. If my data set has 3 X variables, is the lackfit statement still functional?&nbsp;</P><P>&nbsp;</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="HW4 - ANOVA Table.PNG" style="width: 600px;"><img src="https://communities.sas.com/t5/image/serverpage/image-id/27376i9E1D371E4CEE2BA3/image-size/large?v=v2&amp;px=999" role="button" title="HW4 - ANOVA Table.PNG" alt="HW4 - ANOVA Table.PNG" /></span></P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="HW4 - Parameter Estimates.PNG" style="width: 600px;"><img src="https://communities.sas.com/t5/image/serverpage/image-id/27377i5D2C09C4E6F3156C/image-size/large?v=v2&amp;px=999" role="button" title="HW4 - Parameter Estimates.PNG" alt="HW4 - Parameter Estimates.PNG" /></span></P><TABLE border="0" cellspacing="0" cellpadding="0"><TBODY><TR><TD>Obs</TD><TD>CITY</TD><TD>Y</TD><TD>X1</TD><TD>X2</TD><TD>X3</TD></TR><TR><TD>1</TD><TD>1</TD><TD>11.2</TD><TD>587</TD><TD>16.5</TD><TD>6.2</TD></TR><TR><TD>2</TD><TD>2</TD><TD>13.4</TD><TD>643</TD><TD>20.5</TD><TD>6.4</TD></TR><TR><TD>3</TD><TD>3</TD><TD>40.7</TD><TD>635</TD><TD>26.3</TD><TD>9.3</TD></TR><TR><TD>4</TD><TD>4</TD><TD>5.3</TD><TD>692</TD><TD>16.5</TD><TD>5.3</TD></TR><TR><TD>5</TD><TD>5</TD><TD>24.8</TD><TD>1248</TD><TD>19.2</TD><TD>7.3</TD></TR><TR><TD>6</TD><TD>6</TD><TD>12.7</TD><TD>643</TD><TD>16.5</TD><TD>5.9</TD></TR><TR><TD>7</TD><TD>7</TD><TD>20.9</TD><TD>1964</TD><TD>20.2</TD><TD>6.4</TD></TR><TR><TD>8</TD><TD>8</TD><TD>35.7</TD><TD>1531</TD><TD>21.3</TD><TD>7.6</TD></TR><TR><TD>9</TD><TD>9</TD><TD>8.7</TD><TD>713</TD><TD>17.2</TD><TD>4.9</TD></TR><TR><TD>10</TD><TD>10</TD><TD>9.6</TD><TD>749</TD><TD>14.3</TD><TD>6.4</TD></TR><TR><TD>11</TD><TD>11</TD><TD>14.5</TD><TD>7895</TD><TD>18.1</TD><TD>6</TD></TR><TR><TD>12</TD><TD>12</TD><TD>26.9</TD><TD>762</TD><TD>23.1</TD><TD>7.4</TD></TR><TR><TD>13</TD><TD>13</TD><TD>15.7</TD><TD>2793</TD><TD>19.1</TD><TD>5.8</TD></TR><TR><TD>14</TD><TD>14</TD><TD>36.2</TD><TD>741</TD><TD>24.7</TD><TD>8.6</TD></TR><TR><TD>15</TD><TD>15</TD><TD>18.1</TD><TD>625</TD><TD>18.6</TD><TD>6.5</TD></TR><TR><TD>16</TD><TD>16</TD><TD>28.9</TD><TD>854</TD><TD>24.9</TD><TD>8.3</TD></TR><TR><TD>17</TD><TD>17</TD><TD>14.9</TD><TD>716</TD><TD>17.9</TD><TD>6.7</TD></TR><TR><TD>18</TD><TD>18</TD><TD>25.8</TD><TD>921</TD><TD>22.4</TD><TD>8.6</TD></TR><TR><TD>19</TD><TD>19</TD><TD>21.7</TD><TD>595</TD><TD>20.2</TD><TD>8.4</TD></TR><TR><TD>20</TD><TD>20</TD><TD>25.7</TD><TD>3353</TD><TD>16.9</TD><TD>6.7</TD></TR></TBODY></TABLE> Sat, 23 Feb 2019 17:40:58 GMT https://communities.sas.com/t5/SAS-Programming/Issue-with-adding-quot-lackfit-quot-statment/m-p/537997#M148063 mpiotro2 2019-02-23T17:40:58Z Re: Issue with adding "lackfit" statment https://communities.sas.com/t5/SAS-Programming/Issue-with-adding-quot-lackfit-quot-statment/m-p/538007#M148070 <P>Lack-of-fit/pure error can only be computed if you have one or more exact replicates of your points (among the x-variables). You have zero exact replicates of your data points.</P> <P><BR />So SAS is giving the correct output.</P> Sat, 23 Feb 2019 19:25:46 GMT https://communities.sas.com/t5/SAS-Programming/Issue-with-adding-quot-lackfit-quot-statment/m-p/538007#M148070 PaigeMiller 2019-02-23T19:25:46Z