R programming: drc package error

0 votes

I'm a new bee to R programming. My problem is, how do I get the standard deviations for each concentration (0,1,5,10,15,20 mg/L) to get displayed on the plot?

Here's my code:

    72 timer LC50
> LC50_72hR<-read.csv(file.choose(),dec=".",sep=" ", header=TRUE)
> LC50_72hR
   Concentration Total Dead
1              0    20    1
2              0    20    1
3              0    20    1
4              1    20    4
5              1    20    2
6              1    20    5
7              5    20    7
8              5    20   11
9              5    20   10
10            10    20   11
11            10    20   16
12            10    20   15
13            15    20   16
14            15    20   18
15            15    20   20
16            20    20   19
17            20    20   20
18            20    20   20
> LC50_72hR<-drm(Dead/Total~Concentration,weights=Total,fct=LL.2(),type="binomial",data=LC50_72hR)
> summary(LC50_72hR)

Model fitted: Log-logistic (ED50 as parameter) with lower limit at 0 and upper limit at 1 (2 parms)

Parameter estimates:

              Estimate Std. Error  t-value p-value
b:(Intercept) -1.40548    0.16443 -8.54734       0
e:(Intercept)  4.09353    0.49499  8.26987       0
> plot(LC50_72hR)
> ED(LC50_72hR,c(10,50,90))

Estimated effective doses

     Estimate Std. Error
1:10  0.85734     0.2242
1:50  4.09353     0.4950
1:90 19.54538     3.2559

How do I put std dev on my plot?

Apr 5, 2019 in Data Analytics by Tyrion anex
• 8,560 points
192 views

1 answer to this question.

0 votes

You need two variables, (x and y). In the regression, you divided dead/total means this is one variable (x) and you have another variable for concentration. This way you can easily plot the SD on your data.

answered Apr 5, 2019 by Sophie may
• 10,100 points

Related Questions In Data Analytics

+3 votes
2 answers

Error: could not find function - R Programming

Yes, Just like @Maverik said, It happens ...READ MORE

answered Aug 22, 2019 in Data Analytics by anonymous
• 32,490 points
19,632 views
0 votes
1 answer

"no applicable method" Error in r programming

This is caused by using an object-oriented ...READ MORE

answered Oct 31, 2018 in Data Analytics by Kalgi
• 51,970 points
544 views
+1 vote
1 answer

“subscript out of bounds” Error in r programming

This error is likely to occur when ...READ MORE

answered Oct 31, 2018 in Data Analytics by Kalgi
• 51,970 points
6,594 views
0 votes
1 answer

Error saying "R Error: package ‘lme4’ required by ‘pbkrtest’ could not be found"

Windows 7, revo R 3.2.3 construct a directory ...READ MORE

answered Nov 9, 2018 in Data Analytics by Maverick
• 10,820 points
123 views
+1 vote
1 answer

R programming error

Alright, you can either use gsub to match the ...READ MORE

answered Dec 18, 2018 in Data Analytics by Tyrion anex
• 8,560 points
84 views
+1 vote
1 answer

R Programming: Market Basket Analysis Error

The basket.sorted() has less than 5 rules. Refer ...READ MORE

answered Feb 11, 2019 in Data Analytics by Sophie may
• 10,100 points
464 views
+1 vote
1 answer

R Programming: regexpr error

The below code will help: gregexpr("D", x) # [[1]] # ...READ MORE

answered Feb 21, 2019 in Data Analytics by Tyrion anex
• 8,560 points
77 views
+1 vote
1 answer

R programming: Graphs

Try this: ggplot(dfc, aes(x=x, y=y, colour=f, fill=f, ymin=y-se, ...READ MORE

answered Feb 21, 2019 in Data Analytics by Tyrion anex
• 8,560 points
90 views
0 votes
1 answer

R programming: Unexpected symbol error

Format your code this way: myfunction <- function() ...READ MORE

answered Dec 17, 2018 in Data Analytics by Sophie may
• 10,100 points
1,348 views
0 votes
1 answer

R Programming error in 'fert'

You're using a factor: fert <- factor(c(50,20,10,10,20,50)) levels(fert) #[1] ...READ MORE

answered Dec 27, 2018 in Data Analytics by Sophie may
• 10,100 points
110 views