Graph not being plot
I have built a JavaScript P5.js program to plot graphs. Everything works apart from the points do not appear on the display, and when they do they don't follow the trend the graph should.
function setup() {
H = 800;
W = 800;
wFreq = 20;
hFreq = 20;
wDist = H / hFreq;
hDist = W / wFreq;
uLength = 10;
createCanvas(W, H);
}
function formula(x) {
//0x² + 0x - 0
sum = 0;
sum += x*x;
sum += 0;
sum += 0;
return sum
}
function draw() {
background(220);
translate(0, 0)
rect(0, H/2, W, 0);
rect(W/2, 0, 0, H);
translate(0, H/2);
for(i = W/2; i -= 1; i > 0) {
rect((i-0.5) * wDist /2, -uLength/2, 0, uLength);
}
translate(W/2, -H);
for(i = H/2; i -= 1; i > 0) {
rect(-uLength/2,i * (hDist -1) /(4*(10/hFreq)), uLength, 0);
}
translate(200, 200);
for(i = -wFreq; i += 1; i < wFreq) {
rect(i*wDist, formula(i), 1, 1);
}
}
javascript p5.js
edited Nov 20 '18 at 18:15
Kevin Workman
34.1k54172
asked Nov 20 '18 at 18:00
Samuel PollardSamuel Pollard
1
add a comment |
I have built a JavaScript P5.js program to plot graphs. Everything works apart from the points do not appear on the display, and when they do they don't follow the trend the graph should.
function setup() {
H = 800;
W = 800;
wFreq = 20;
hFreq = 20;
wDist = H / hFreq;
hDist = W / wFreq;
uLength = 10;
createCanvas(W, H);
}
function formula(x) {
//0x² + 0x - 0
sum = 0;
sum += x*x;
sum += 0;
sum += 0;
return sum
}
function draw() {
background(220);
translate(0, 0)
rect(0, H/2, W, 0);
rect(W/2, 0, 0, H);
translate(0, H/2);
for(i = W/2; i -= 1; i > 0) {
rect((i-0.5) * wDist /2, -uLength/2, 0, uLength);
}
translate(W/2, -H);
for(i = H/2; i -= 1; i > 0) {
rect(-uLength/2,i * (hDist -1) /(4*(10/hFreq)), uLength, 0);
}
translate(200, 200);
for(i = -wFreq; i += 1; i < wFreq) {
rect(i*wDist, formula(i), 1, 1);
}
}
javascript p5.js
edited Nov 20 '18 at 18:15
Kevin Workman
34.1k54172
asked Nov 20 '18 at 18:00
Samuel PollardSamuel Pollard
1
I don't think0x² + 0x - 0is what you meant to write
– Joseph Young
Nov 20 '18 at 18:03
add a comment |
I have built a JavaScript P5.js program to plot graphs. Everything works apart from the points do not appear on the display, and when they do they don't follow the trend the graph should.
function setup() {
H = 800;
W = 800;
wFreq = 20;
hFreq = 20;
wDist = H / hFreq;
hDist = W / wFreq;
uLength = 10;
createCanvas(W, H);
}
function formula(x) {
//0x² + 0x - 0
sum = 0;
sum += x*x;
sum += 0;
sum += 0;
return sum
}
function draw() {
background(220);
translate(0, 0)
rect(0, H/2, W, 0);
rect(W/2, 0, 0, H);
translate(0, H/2);
for(i = W/2; i -= 1; i > 0) {
rect((i-0.5) * wDist /2, -uLength/2, 0, uLength);
}
translate(W/2, -H);
for(i = H/2; i -= 1; i > 0) {
rect(-uLength/2,i * (hDist -1) /(4*(10/hFreq)), uLength, 0);
}
translate(200, 200);
for(i = -wFreq; i += 1; i < wFreq) {
rect(i*wDist, formula(i), 1, 1);
}
}
javascript p5.js
edited Nov 20 '18 at 18:15
Kevin Workman
34.1k54172
asked Nov 20 '18 at 18:00
Samuel PollardSamuel Pollard
1
I have built a JavaScript P5.js program to plot graphs. Everything works apart from the points do not appear on the display, and when they do they don't follow the trend the graph should.
function setup() {
H = 800;
W = 800;
wFreq = 20;
hFreq = 20;
wDist = H / hFreq;
hDist = W / wFreq;
uLength = 10;
createCanvas(W, H);
}
function formula(x) {
//0x² + 0x - 0
sum = 0;
sum += x*x;
sum += 0;
sum += 0;
return sum
}
function draw() {
background(220);
translate(0, 0)
rect(0, H/2, W, 0);
rect(W/2, 0, 0, H);
translate(0, H/2);
for(i = W/2; i -= 1; i > 0) {
rect((i-0.5) * wDist /2, -uLength/2, 0, uLength);
}
translate(W/2, -H);
for(i = H/2; i -= 1; i > 0) {
rect(-uLength/2,i * (hDist -1) /(4*(10/hFreq)), uLength, 0);
}
translate(200, 200);
for(i = -wFreq; i += 1; i < wFreq) {
rect(i*wDist, formula(i), 1, 1);
}
}
javascript p5.js
javascript p5.js
edited Nov 20 '18 at 18:15
Kevin Workman
34.1k54172
asked Nov 20 '18 at 18:00
Samuel PollardSamuel Pollard
1
edited Nov 20 '18 at 18:15
Kevin Workman
34.1k54172
asked Nov 20 '18 at 18:00
Samuel PollardSamuel Pollard
1
edited Nov 20 '18 at 18:15
Kevin Workman
34.1k54172
edited Nov 20 '18 at 18:15
Kevin Workman
34.1k54172
edited Nov 20 '18 at 18:15
Kevin Workman
34.1k54172
34.1k54172
asked Nov 20 '18 at 18:00
Samuel PollardSamuel Pollard
1
asked Nov 20 '18 at 18:00
Samuel PollardSamuel Pollard
1
asked Nov 20 '18 at 18:00
Samuel PollardSamuel Pollard
1
1
I don't think0x² + 0x - 0is what you meant to write
– Joseph Young
Nov 20 '18 at 18:03
add a comment |
I don't think0x² + 0x - 0is what you meant to write
– Joseph Young
Nov 20 '18 at 18:03
I don't think
0x² + 0x - 0 is what you meant to write– Joseph Young
Nov 20 '18 at 18:03
I don't think
0x² + 0x - 0 is what you meant to write– Joseph Young
Nov 20 '18 at 18:03
add a comment |
1 Answer
1
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oldest
votes
Note that your calls to translate() stack.
I'm not sure exactly where you want your points to show up, but to help you debug, I can see the points if I change your translate(200, 200); call to translate(400, 400); instead.
You'll have to play with the values you pass in to achieve the effect you want. You also might want to look up the push() and pop() functions in the reference.
You might also consider not using translate() at all, and using the coordinates directly in your drawing code.
answered Nov 20 '18 at 18:15
Kevin WorkmanKevin Workman
34.1k54172
add a comment |
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1 Answer
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active
oldest
votes
1 Answer
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active
oldest
votes
active
oldest
votes
active
oldest
votes
Note that your calls to translate() stack.
I'm not sure exactly where you want your points to show up, but to help you debug, I can see the points if I change your translate(200, 200); call to translate(400, 400); instead.
You'll have to play with the values you pass in to achieve the effect you want. You also might want to look up the push() and pop() functions in the reference.
You might also consider not using translate() at all, and using the coordinates directly in your drawing code.
answered Nov 20 '18 at 18:15
Kevin WorkmanKevin Workman
34.1k54172
add a comment |
Note that your calls to translate() stack.
I'm not sure exactly where you want your points to show up, but to help you debug, I can see the points if I change your translate(200, 200); call to translate(400, 400); instead.
You'll have to play with the values you pass in to achieve the effect you want. You also might want to look up the push() and pop() functions in the reference.
You might also consider not using translate() at all, and using the coordinates directly in your drawing code.
answered Nov 20 '18 at 18:15
Kevin WorkmanKevin Workman
34.1k54172
add a comment |
Note that your calls to translate() stack.
I'm not sure exactly where you want your points to show up, but to help you debug, I can see the points if I change your translate(200, 200); call to translate(400, 400); instead.
You'll have to play with the values you pass in to achieve the effect you want. You also might want to look up the push() and pop() functions in the reference.
You might also consider not using translate() at all, and using the coordinates directly in your drawing code.
answered Nov 20 '18 at 18:15
Kevin WorkmanKevin Workman
34.1k54172
Note that your calls to translate() stack.
I'm not sure exactly where you want your points to show up, but to help you debug, I can see the points if I change your translate(200, 200); call to translate(400, 400); instead.
You'll have to play with the values you pass in to achieve the effect you want. You also might want to look up the push() and pop() functions in the reference.
You might also consider not using translate() at all, and using the coordinates directly in your drawing code.
answered Nov 20 '18 at 18:15
Kevin WorkmanKevin Workman
34.1k54172
answered Nov 20 '18 at 18:15
Kevin WorkmanKevin Workman
34.1k54172
answered Nov 20 '18 at 18:15
Kevin WorkmanKevin Workman
34.1k54172
answered Nov 20 '18 at 18:15
Kevin WorkmanKevin Workman
34.1k54172
34.1k54172
add a comment |
add a comment |
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I don't think
0x² + 0x - 0is what you meant to write– Joseph Young
Nov 20 '18 at 18:03