Graph not being plot
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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 at 18:15
Kevin Workman
33.3k53968
asked Nov 20 at 18:00
Samuel Pollard
1
add a comment |
up vote
0
down vote
favorite
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 at 18:15
Kevin Workman
33.3k53968
asked Nov 20 at 18:00
Samuel Pollard
1
I don't think0x² + 0x - 0is what you meant to write
– Joseph Young
Nov 20 at 18:03
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
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 at 18:15
Kevin Workman
33.3k53968
asked Nov 20 at 18:00
Samuel 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 at 18:15
Kevin Workman
33.3k53968
asked Nov 20 at 18:00
Samuel Pollard
1
edited Nov 20 at 18:15
Kevin Workman
33.3k53968
asked Nov 20 at 18:00
Samuel Pollard
1
edited Nov 20 at 18:15
Kevin Workman
33.3k53968
edited Nov 20 at 18:15
Kevin Workman
33.3k53968
edited Nov 20 at 18:15
Kevin Workman
33.3k53968
33.3k53968
asked Nov 20 at 18:00
Samuel Pollard
1
asked Nov 20 at 18:00
Samuel Pollard
1
asked Nov 20 at 18:00
Samuel Pollard
1
1
I don't think0x² + 0x - 0is what you meant to write
– Joseph Young
Nov 20 at 18:03
add a comment |
I don't think0x² + 0x - 0is what you meant to write
– Joseph Young
Nov 20 at 18:03
I don't think
0x² + 0x - 0 is what you meant to write– Joseph Young
Nov 20 at 18:03
I don't think
0x² + 0x - 0 is what you meant to write– Joseph Young
Nov 20 at 18:03
add a comment |
1 Answer
1
active
oldest
votes
up vote
1
down vote
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 at 18:15
Kevin Workman
33.3k53968
add a comment |
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1 Answer
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active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
1
down vote
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 at 18:15
Kevin Workman
33.3k53968
add a comment |
up vote
1
down vote
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 at 18:15
Kevin Workman
33.3k53968
add a comment |
up vote
1
down vote
up vote
1
down vote
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 at 18:15
Kevin Workman
33.3k53968
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 at 18:15
Kevin Workman
33.3k53968
answered Nov 20 at 18:15
Kevin Workman
33.3k53968
answered Nov 20 at 18:15
Kevin Workman
33.3k53968
answered Nov 20 at 18:15
Kevin Workman
33.3k53968
33.3k53968
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 at 18:03